The Bengals are still in the market for a veteran backup quarterback, and they may have found one that was once on the roster.
Per ESPN's Adam Caplan, the Bengals are hosting quarterback Josh Johnson on Thursday. He actually spent the 2013 season backing up Andy Dalton under offensive coordinator Jay Gruden, but was let go the ensuing offseason once Gruden left for Washington.
Johnson signed with the San Francisco 49ers in May of 2014, was released on September 20, 2014, re-signed on September 23, released again on October 10 and re-signed on October 14, 2014.
Needless to say, he's not someone to be confident with in being your backup, and he'd probably compete with AJ McCarron for the No. 2 spot behind Dalton in 2015 if signed.
If he loses out to AJ, Johnson would likely be cut, as not many teams keep a veteran for their third QB. That's usually reserved for developmental guys, as McCarron was last year.
Oh, and Johnson hasn't attempted a pass in four years since his days with Tampa in 2011, but boy can he hold a clipboard like a boss.