Third baseman Chase Headley, coming off one of the best single-season performances in Padres history, could miss Opening Day because of an injured left thumb, learned late Sunday night. Headley, who won Silver Slugger and Gold Glove Awards last season, sustained what the Padres' medical staff initially termed a jammed thumb trying to break up a double play Sunday against the Angels in Tempe. "We're going to have some studies done ... X-rays and maybe some other scans," manager Bud Black said of Headley, who wasn't available to reporters after the game because he was undergoing tests. The Padres open the regular season on April 1 against the Mets at Citi Field. Headley singled in the top of the first inning and jammed his thumb against second base when he slid into the bag. He played defense in the bottom of the inning before leaving the game. "He went to slide into second base and got stuck and twisted around and his thumb ended up hitting the bag ... his thumb was in a bad spot," Black said. Headley led the National League in RBIs (115) last season and had a breakout year at the plate, hitting a career-high 31 home runs. A switch-hitter, Headley produced big numbers in pitcher-friendly Petco Park and on the road. He also finished fifth in the NL in MVP voting. Headley is hitting .448 this Cactus League season in 29 at-bats while essentially playing every other day. Black has eased his regular position players into the lineup with the longer Spring Training. If the Padres are without Headley for a significant period of time, they have two in-house options for third base -- Logan Forsythe and Jedd Gyorko.