It looks like the Boston Red Sox – Carlos Delgado experiment is over. According to Delgado’s agent (via Scott Lauber of the Boston Herald), David Sloane, the first baseman was diagnosed with a small tear in his left him.

Delgado signed a Minor League deal with the Boston Red Sox and had been preparing to make a comeback at Triple-A Pawtucket before he suffered this injury. He left Pawtucket to be examined by Dr. Marc Phillipon, the doctor who performed his previous hip surgeries.

“He’s extremely disappointed,” Sloane told the Boston Herald. “It would be tough for a human being to not be disappointed. He wouldn’t be human if he wasn’t very upset about it.”

Delgado had the option to opt-out of his contract on September 1st, but as of yesterday, he has decided to remain with the club. The PawSox have only a handful of games left this season, so it’s unlikely that Delgado will have enough time to rehab to join the Major League roster.

Delgado was signed in early August to provide the Sox insurance at first base. He has gone 3-for-13 since his return to professional baseball. Delgado, coming off arthroscopic surgery on his right hip, has not played since May 10, 2009.