CLEVELAND — Welcome to The Jungle, Johnny.

With starting quarterback Josh McCown unable to play because of a painful rib injury, Johnny Manziel will start tonight against the Cincinnati Bengals, who treated him so rudely as a rookie on the road last year and now get him on their home turf.

In his first NFL start last season, Manziel was chased, sacked, intercepted and taunted by the Bengals in a 30-0 embarrassment.

Now, Manziel’s facing one of the league’s four remaining unbeaten teams on short notice.

McCown was unable to practice Tuesday night because of his ribs — and sore shoulder — and Browns coach Mike Pettine announced the decision to start Manzitel before the team left for Cincinnati.