NEW YORK -- Jeff Francoeur is now, officially, a member of the 2009 New York Mets.

Francoeur's two-run single in his first Mets at-bat, his first Mets home run and his lining into a game-ending triple play -- the first unassisted one hit into in Mets history -- were minor landmarks compared to this one.

Francoeur tore a ligament in his left thumb.

The right fielder sustained the injury while diving to catch Eric Bruntlett's sinking fly ball in the top of the ninth inning of Sunday's 9-7 loss to the Phillies. Francoeur stayed in the game, only to see Bruntlett return the favor and then some on his triple play, but his thumb swelled up overnight. An MRI on Monday revealed the tear.

It's similar to the injury sustained by Alex Cora in May. Cora tore ligaments in both of his thumbs on back-to-back days against the Giants. After a stint on the disabled list, Cora returned to the lineup for more than two months before deciding to undergo season-ending surgery on both thumbs.

Francoeur is listed as day-to-day. If he is placed on the disabled list, he will become the 12th Met currently on the DL.