The Bruins have enacted one of a series of options for the struggling third line, and called up winger Jordan Caron from the AHL’s Providence Bruins on Friday. Caron was wearing a gray jersey at practice and skating with Jay Pandolfo, Chris Kelly and Rich Peverley as the coaching staff figures out a way to get both Kelly and Peverley untracked. Kelly has one goal in 21 games this season and is a minus-7 after finishing in the NHL’s top 10 with a plus-33 last season, and Peverley is a team-worst minus-9 with only three goals in 21 games. They are both far cries from the players they’ve been in Boston over the last couple of years – and the third line’s offensive abilities has been a key factor in Boston’s depth-based attack. Caron potted his 10th goal of the season for Providence last weekend and has seven points (4 goals, 3 assists) and a plus-1 in his last nine games for the B’s farm club. Otherwise it’s been a struggle for the 22-year-old this season while trying to build on his successful half of the year in Boston last season. He didn’t play well in front of the Bruins coaching staff during the NHL lockout, and then suffered an upper body injury that kept him out of Bruins training camp in January. Chris Bourque also met with Bruins general manager Peter Chiarelli, and learned that he had cleared waivers and would be reporting back to the Providence Bruins.