Jenrry Mejia’s final bid for a rotation spot ended with a knockout Friday night at Olympic Stadium.

Toronto Blue Jays second baseman Ryan Goins’ liner struck Mejia in the right forearm to open the bottom of the fifth inning. After a visit from Terry Collins and trainer Ray Ramirez, Mejia slowly walked off the mound.

Mejia departed for a local hospital as the game ended to get X-rays.

The forearm issue raises questions about whether Mejia will be available to take a potential start next Friday against the Cincinnati Reds at Citi Field.

“I’ll tell you one thing: When I walked out there, I don’t think I’ve seen a lump on a guy’s arm come up so fast,” Collins said. “He got it pretty good.”

Collins appeared to suggest pregame Friday that Mejia was headed for the Game 4 start against the Reds, with Daisuke Matsuzaka being held back for a potential start two days later as a hedge against Jonathon Niese not being ready to return from a season-opening DL trip.

Now, if Mejia is unavailable, Matsuzaka likely would start Game 4 and John Lannan would be the hedge against Niese being unavailable.

“One thing we’re very, very lucky to have right now is some depth,” Collins said. “We’ve got Lannan stretched out if we need a guy, obviously Dice-K tomorrow. The best thing is Jon Niese felt great today. He threw 45 ... from 90 feet -- no discomfort -- after pitching yesterday. So it looks like he’s going to make that [minor-league] start on the 1st [of April] and get to 90 pitches or so.”

Mejia had been forced from his previous start after five innings because of discomfort with a bunion on the outside of his right big toe.

Until Mejia was forced to depart his final 2014 exhibition appearance, he had limited the Blue Jays to a fourth-inning solo homer by Jose Bautista.

Combining this performance with his Grapefruit League showing, Mejia produced a 2.70 ERA in 13 1/3 innings.