Pirates infielder Jordy Mercer was injured by a take out slide while turning a double play earlier today. The extent of the injury is unknown. The Pirates may activate utility infielder Brent Morel if Mercer misses more than a few days, writes Bill Brink of the Pittsburgh Post-Gazette. The club is already carrying a short bench, and none of the three healthy players have experience at third base. Morel was pulled from his Triple-A start today. The Pirates 40-man roster is full, so activating Morel will require a roster move.