Long-sought after pitcher Jason Middlebrook has finally joined the Mets, and is in uniform No. 27 awaiting a start later this week. Heretofore, Middlebrook was a “Phantom Met” acquired from, and lost to, the waiver wire in 2000. On Monday, the Mets announced that outfielder Brady Clark was named as the fourth and final prize of the Shawn Estes bounty. He was expected to join the big club this week wearing No. 15.