By now you know that the Mets returned Jenrry Mejia from whence he came, dispatching him to Binghamton to start games.

Good.

All things considered, Mejia’s stint with the big-league club didn’t go as terribly as it could have. His 30 big-league appearances likely did not cripple his development, and it’s impossible to determine the value of some Major League experience. Maybe seeing how hitters caught up to his fastball will inspire him to hone his secondary arsenal in the Minors. Who knows?

Of course, Mejia likely would have been more effective, and those 30 big-league appearances more valuable to the team, if the Mets had started him out in the Minors working on his changeup and curveball and then — if they were absolutely desperate for a reliever — advanced him to the big club later in the season as he approached his innings limit.

But whatever. Past mistakes are in the past. Though the Mets’ front office should not be excused for starting the season with Gary Matthews Jr. and Mike Jacobs in the lineup and Mejia in the bullpen, it should at least be commended for recognizing those errors and moving forward. Baby steps.

Familiar face Bobby Parnell will join the Mets’ bullpen in Mejia’s stead. He heads to Flushing off a solid run in Buffalo; the fireballer posted a 4:25 K:BB ratio since May 1 while whiffing more than a batter per inning.

So that’s good too.