According to a major league source, the Red Sox have shown some interest in free agent catcher A.J. Pierzynski. The backstop — who will turn 37 years-old Dec. 30 — played on a one-year, $7.5 million contract with the Rangers in 2013. Pierzynski totaled 134 games in ’13, hitting .272 with a .722 OPS and 17 home runs. The left-handed hitter actually hit 10 points higher against lefty pitching than right-handers (.279-.269). Pierzynski’s strength continues to be his bat, although he doesn’t display the kind of patience the Red Sox usually look for. (He walked just three times in the season’s second half.) He is considered a fierce competitor — a trait that has sometimes drawn ire from opponents. The Orlando native has also been singled out for his above-average game awareness. The 16-year veteran’s defensive skills have diminished, with his ability to frame pitches particularly coming into question last season. But Pierzynski is still considered durable, catching 119 games or more in each of the past 12 seasons.