Blaine Boyer sits at his locker in the Port St. Lucie clubhouse, tossing his possessions into a large cardboard box. The locker next to his, once belonging to Boof Bonser, is empty. Two lockers down, Tim Byrdak reads a newspaper. To Byrdak’s left, the locker once assigned to Mike O’Connor is empty.

A whiteboard on the wall reminds everyone shipping cars to New York to remove all personal items from their cars before they do so. A couple of players chat about lining up apartments in the city. Mike Nickeas arranges plans to crash on Ike Davis’ couch for a while. Jose Reyes sings in Spanish. Josh Thole jokes with reporters. Lucas Duda checks a travel schedule on a bulletin board.

A clubhouse attendant emerges from a back room with a light brown maple bat. “Hey Murph, what about this one?” he asks, handing the bat to Daniel Murphy. Murphy examines it for a second. “I’ll take this one on the road,” he says, handing it back.

The Mets are packing up. Nearly 60 players opened Major League camp with the club in mid-February. Now almost half of them are gone, sent to the Minor League side a couple hundred yards away or sent elsewhere entirely.

Wearing a golf shirt and jeans, Manny Acosta walks through the clubhouse carrying a loosely taped cardboard box under his arm. He stops at Pedro Beato’s locker. The pitchers share a brief conversation then a hug, and Acosta exits toward the parking lot.

People often ask reporters — this one, at least — to assess the mood in a team’s locker room, as if that’s something that can be measured.

I can say for certain that the clubhouse smells like sweat and suntan lotion, scents that indicate a combination of physical work and measured preparation — hallmarks of Spring Training.

Some players seem cheerful, enthusiastic. Davis struts down the row of lockers with a joke or a goofy grin for all his teammates. Beato insists Jay Horwitz learn how to dance. Others seem focused, anticipant of either the forthcoming season or the final Spring Training game. Brad Emaus eats breakfast and fills out a form, stopping to ask reporters Citi Field’s ZIP code. Chin-Lung Hu picks a few bats out of a large bin near the clubhouse exit and takes soft practice cuts with each.

Is it a good clubhouse or a bad clubhouse? Damned if I know. Maybe I don’t have enough data points for comparison. At times last year, the Mets’ locker room at Citi Field seemed about as cheery a place as you could find: Rod Barajas pumping tunes from his iPod through a boombox while Alex Cora giddily mock-soloed on a Guitar Hero controller. At other times, naturally, the mood was a bit darker.

The 2011 Mets appear ready. Players making the team know they’re making the team. Boxes and suitcases are packed and being loaded on to the truck outside. At 10 a.m. tomorrow, the Mets will board a bus for the two-hour trip to their hotel in Miami. They will work out at Sun Life Stadium in the afternoon, then play their first game Friday at 7:10 p.m.

From then on, I imagine, we’ll spend a lot more time concerning ourselves with the performance on the field than the mood in the clubhouse. No one doubts they are closely tied, but I suspect the former mostly determines the latter.

This one won’t take long.

The third basemen in April: David Wright, Daniel Murphy.

Overview: That’s the other thing about these 74-win type predictions: You remember the Mets still have (among others) David Wright, right? And yeah, I know he wasn’t the same player in 2009 and 2010 that he was from 2006-2008, and that one good player does not a great team make, but it’s like everyone has gotten so caught up in Wright’s weird fluctuations at the plate that they’ve forgotten that even at worst he’s still awesome.

Wright’s 131 OPS+ was second best among NL third basemen in 2010. He can boast the Majors’ highest cumulative fWAR at his position since 2006. He is 28 years old.

Yes, the increasing strikeout totals over the last two years are worrisome, what with the flailing at pitches on the outside part of the plate and the ducking away from curveballs on the inside half. People have blamed Howard Johnson and Matt Cain. I’ve got no great explanation. I only know that none of it has yet prevented Wright from being a great hitter, and that, despite watching two years of his relative “struggles,” I will always, always bet on David Wright triumphing over any adversity he meets at the plate.

Even if Wright has another year like 2009 or another year like 2010 (I distinguish them because they were, for him, very different years), he will still be among the very best third basemen in the game. If, under a new manager and hitting coach, Wright reverts to the form he showed from 2006-2008, he may be the best.

The third basemen in September: Wright, maybe Murphy.

How they stack up: Wright is better than Placido Polanco, Donnie Murphy and, at this point, Chipper Jones. Ryan Zimmerman has probably been better than Wright over the past two seasons, in large part because of his far superior defense. Zimmerman did seem to benefit — at least in part — from a batting average on balls in play a bit better than his career norms, but it’s hard to confidently say he won’t be as good or better than Wright in 2011. But even so, there’s really no shame in being the second best third baseman in the division when the first has been among the best players in the game for two straight seasons.

It’s pronounced E-miss, not E-moss or E-mouse.

The second basemen in April: Brad Emaus, Daniel Murphy, Chin-Lung Hu.

Overview: You might know I was an advocate of the brief and ill-fated Justin Turner Lobby, which ended when the red-headed infielder was officially dispatched to Triple-A earlier this week. Unlike the Rule 5 pick Emaus, Turner could be sent to Buffalo without first being offered to other organizations, so the Mets’ front office opted to keep Emaus around to extend his audition into the season — maximizing organizational depth.

So that’s good.

I’m not sure how Emaus will turn out. There are questions about his defense and his ability to hit outside the Pacific Coast League.

What I know for sure, though, is that he’s not Luis Castillo. He’s not Argenis Reyes or Damion Easley or Luis Hernandez either. He’s a guy that might actually contribute to the Mets’ next contender, an unknown preferable to the known-to-be-bad. Emaus showed great plate discipline in the Minors, always a good sign for a young hitter. He doesn’t look awful at second base in drills and Spring Training games. Maybe he’ll stick around a while.

I keep using that phrase: “The Mets’ next contender.” I should add that I don’t know when that’s coming, but I’m not sure it’s as far off as some people think. I’ve seen columnists — people paid to opine about sports — actually dismiss the Mets’ chances for this year and next. That’s crazy. Have you never seen baseball? I made the mistake of writing off the Padres before last season and it’s not one I’m aiming to repeat. Well-run teams, with or without massive financial resources, can turn things around in a hurry.

I’m not sure how Emaus will turn out because no one is sure how Emaus will turn out. But the decision to make Emaus the starting second baseman to open the season shows that perhaps the Mets are past their perpetual myopia and are now making the right choices to benefit their current and future rosters.

Perhaps this is just fanboy optimism because Sandy Alderson hasn’t yet lost the benefit of the doubt, but I feel confident that if Emaus can’t handle the job, the Mets will keep searching until they find someone who can.

Maybe that’s Murphy, no matter how bad he looks at second to the untrained eye. Maybe it’s Turner or Reese Havens. Maybe it’s some guy in some other organization that we haven’t heard of yet. Who cares, really? The important thing is that it looks like the Mets’ front office now bases its decisions on evidence and foresight.

The second basemen in September: Havens, at least one of the guys currently on the team.

Now there’s some very distinct fanboy optimism. Havens has yet to stay on the field for a full season. Call it a weird gut feeling, or a hope based on his numbers that if he stays healthy he’ll move quickly through the Minors.

How they stack up: Hard to say since Emaus hasn’t played much. I bet — and I’m really going out on a limb here — he’ll be better than Luis Castillo and worse than Chase Utley, whenever he returns. Despite crappy defense, Dan Uggla will still hit enough to be better than anyone the Mets trot out in 2011. New Marlin Omar Infante is likely to regress from his All-Star 2010 campaign. Nationals prospect Danny Espinosa will eventually hit a bit, but he strikes out a lot. I’ll guess the Mets’ second basemen wind up playing fourth best in the division, better than one of Infante or Espinosa but not as well as Utley or Uggla.

Less talk more rock:

The first basemen in April: Ike Davis, Daniel Murphy

Overview: Was there a more positive development for the Mets in 2010 than the emergence of Ike Davis as a viable Major League first baseman? (I guess you could say the departure of Omar Minaya if you want to be like that, but I don’t.)

Davis didn’t exactly destroy the ball by first baseman standards — in fact, his 115 OPS+ was below league-average for the position. But he hit in the big leagues at age 23 and with only half a season above A-ball on his resume. He demonstrated power that would not be contained by Citi Field, and played great defense by the eye and stats. And after slumping massively through most of July and August, Davis showed the ability to adjust to Major League pitching and scorched the ball in September, for whatever that’s worth. He even hit lefties better than anyone expected, and in fact better than he hit righties.

It’s all good stuff. Now 24 and under team control until the latter part of the decade, Davis appears ready to be a cornerstone player for the Mets for years to come. A star? Maybe not, but he’s young enough that it’s still a possibility. And based on his strong 2010 campaign, Davis is probably at worst a pretty good Major Leaguer.

Behind Davis, the Mets have a cadre of dudes from his generation ready to fill in. Murphy will serve as the primary backup first baseman with the big club, but Lucas Duda and Nick Evans — should he clear waivers — could join the team from Triple-A if injuries arise. Obviously none has any Major League production as promising as Davis’ 2010 on his resume, but none appears a downright terrible option either. Gone are the days of Mike Jacobs.

The first basemen in September: Davis and Murphy.

How they stack up: Fun fact: By WAR, Davis was better than Adam LaRoche, Gaby Sanchez and Ryan Howard last season, and Braves’ first baseman Freddie Freeman has only 24 Major League at-bats. Freeman looks like he could be a stud, but since he’s still 21 and hasn’t yet proven anything at the big-league level, I’ll say Davis will be a better player in 2011. I’ll take Davis over LaRoche and Sanchez, too.

WAR is not a predictive stat, in part because it heavily weighs defensive metrics, which change greatly from year-to-year. And I’m not at all comfortable saying Davis is currently a better player than Howard. He’s certainly a better defender, and due to age and contract status I’d rather have Davis on my team, but there’s just way more evidence that Howard can hold up as a Major League hitter. Yes, the cracks in the Phillie’s game have been showing for a while now, and his OPS has been on a pretty steady downward trend since his MVP season in 2006, but, you know, he’s still Ryan Howard.

Sandy Alderson just spoke to reporters and said the Mets told players this morning that they finalized the roster.

Blaine Boyer will be added to the roster as the last man in the bullpen. Jason Isringhausen has been offered the option of sticking behind in Port St. Lucie to build up arm strength for a couple of weeks while the Mets assess their Major League bullpen. Alderson said that if Isringhausen got a Major League opportunity from another team in that span, he would be let go.

The Mets’ bench will include Mike Nickeas, Daniel Murphy, Chin-Lung Hu, Scott Hairston and Willie Harris. This confirms: No Nick Evans.

Your 2011 Opening Day bullpen: Francisco Rodriguez, Bobby Parnell, Taylor Buchholz, D.J. Carrasco, Tim Byrdak, Pedro Beato,
and Boyer.

Alderson cannot legally speak about players on waivers, but he indicated that the team will know by 1 p.m. today if players placed on waivers had cleared.

Meanwhile, Jason Bay felt discomfort on the left side of his ribcage during batting practice and was scratched from today’s game. He is en route to Port St. Lucie for an examination. The only revocable type of waivers, Alderson said, are trade waivers, and few players are put on trade waivers at this point in the year. That means Evans cannot be pulled off waivers to join the team in Bay’s stead.

Of course, no one said Bay will need DL time; Alderson opted not to speculate.

So what does it all mean? Well, it means the Mets preferred Harris to Evans to start the season, for better or worse. Toby Hyde wrote an epic post about this today, reiterating many of the points I made earlier this offseason. Harris seems redundant on the bench with Hairston around to be an extra outfielder and Murphy as a left-handed bat, but perhaps the team valued Harris’ defensive versatility over Evans’ cult-hero status.

This morning, Boyer did not sound eager to go to Triple-A, so the team must have determined he would take the opt-out in his contract after all. As I’ve pointed out here on multiple occasions, Manny Acosta has actually been better in the Majors than Boyer has.

If Evans clears waivers, he’ll likely start at first base for a Bisons team loaded with viable near-Major League ready players in their young- to mid-20s. That marks a massive departure from the last few years. With Evans at first, Justin Turner at second, Zach Lutz at third, Ruben Tejada at short and Lucas Duda, Kirk Nieuwenhuis and Fernando Martinez in the the outfield, the people of Buffalo might finally get to enjoy some players on their way up, not the Quad-A mashers worshiped only in this space.

So it seems like we’re done quibbling over the fringes of the roster for now. If Bay needs DL time and Evans stays in the organization, either Evans or Lucas Duda will likely take Bay’s spot on the Opening Day roster.

The other news from Alderson is scarier: Ronny Paulino’s bloodwork confirmed what Alderson described as a stomach/colon issue, and treatment for the issue could cause the catcher to miss time beyond his season-opening suspension. No word on the exact nature of Paulino’s condition, but in terms of the Mets’ roster, that means Mike Nickeas gets a longer stint with the big club than previously expected.

So there’s all that.