The Mets announced yesterday that they agreed to a one-year contract extension with Tim Byrdak. The news came right on the heels of the lefty’s second win of the season.

After a rough start to the year, Byrdak has capably served his role for the Mets. He has held lefties to a .208/.260/.323 line and though he’s 37 now, he’ll likely again be a solid lefty one-out guy in 2012.

After the announcement, Sandy Alderson stressed that the Mets now have two left-handed relievers locked up heading into the offseason: Byrdak and Daniel Herrera. But since Herrera also seems to profile as a LOOGY, it’s tough to imagine the Mets carrying both pitchers on the 25-man roster.

Wait, that’s not true. It’s easy to imagine them doing so, it’s just tough to imagine how it would be a good idea. Unless the team believes Byrdak or Herrara can regularly retire both lefty and righty hitters — Jerry Manuel’s much-coveted “crossover” guy, carrying both would mean committing a pair of rosters sports to maybe 90 total innings. Unless they have a great rotation — which they won’t — that would likely wind up putting a lot of stress on the other arms in the bullpen.

For long parts of this season, much was made of the Mets’ need for a second lefty in the bullpen. That makes sense, given some of the strong lefty hitters in their division and Terry Collins’ worship of platoon matchups. But ideally one of those lefties would need to be able to work more than part-inning stints lest the bullpen collapse on itself (even more).

Also worth nothing: Byrdak is hilarious. Sometime in the next couple weeks I’ll post a montage of his videobombs on teammates.