Early in his career, Mitchell Boggs struggled with walks, but he was an effective bullpen arm once he got them under control. From 2010 through 2012, Boggs threw 201.1 innings for the Cardinals and posted a 3.08 ERA and 124 ERA+ with 7.1 strikeouts per nine and 3.1 walks per nine. This year, however, his walk rate skyrocketed, and he threw just 23.1 innings with the Cardinals and, after a trade, the Rockies with an 8.10 ERA in total.
Considering he'll turn just 30 years old in February, a bonce-back season from Boggs isn't too far fetched. If he can be had on a low-cost deal, he makes sense for the Mets' bullpen.