Boston, MA (My Sportsbook) - Boston Red Sox ace righthander Pedro Martinez was activated from the 15-day disabled list Wednesday in time to start the Red Sox interleague contest against St. Louis at Fenway Park.

Martinez was placed on the disabled list retroactive to May 16 with a strained right lat muscle. In his last start, May 15, he pitched six shutout innings and picked up the win against Texas.

The three-time Cy Young Award winner, who is 4-2 with a 2.83 earned run average on the year, first felt pain near his right shoulder blade while tossing the ball in the outfield on May 19, one day before his scheduled start against the Yankees. He was scratched from that start and has not pitched since.

The Red Sox placed pitchers Casey Fossum and Robert Person on the 15-day DL on Wednesday. Fossum, a lefty, is 4-4 on the season with a 5.76 ERA in 12 starts. Fossum's placement is retroactive to June 8. He left his last start on Saturday against Milwaukee with tendinitis in his left shoulder.

Person, also placed on the DL retroactive to Sunday, is suffering from inflammation in his right hip. The righty has no record, one save and a 7.71 ERA in seven relief appearances this season.

Boston also recalled right handed pitcher Jason Shiell from Triple-A Pawtucket.