Even in his quest for value, Carolina Panthers general manager Dave Gettleman generally stays away from controversial options. He made an exception Friday by claiming offensive tackle Jonathan Martin off waivers.Martin, who was the central victim in the Dolphins’ 2013 bullying controversy, was released by the 49ers Thursday.Miami’s second-round pick in 2012, Martin left the team midway through the 2013 season. An NFL investigation determined Martin faced consistent harassment from Richie Incognito and two other Dolphins offensive linemen.Miami traded Martin to San Francisco last offseason for a conditional seventh-round pick. He appeared in 15 games at right tackle for the 49ers, making nine starts. Pro Football Focus rated him as the 60th-best tackle in 2014, 15 spots ahead of Panthers’ new left tackle Michael Oher and 23 better than former left tackle Byron Bell.Martin, who’s started 32 of the 38 games he’s played in three seasons, is a cost-effective addition to a Panthers offensive line that can use as much depth as possible.“Our goal is to build the strongest roster possible and add competition at every position,” Gettleman said in a statement. “Jonathan brings quality experience to our offensive line, having started 32 games in his career at both tackle spots.”Martin is the second victim of the Dolphins’ bullying scandal signed by the Panthers. Offensive tackle Andrew McDonald spent the second half of 2013 on the practice squad. He was then part of the final round of cuts last August.