Blue Jays' Travis has no idea how he injured knee

This one's a mystery to Devon Travis.

The oft-injured Toronto Blue Jays second baseman found himself back on the disabled list Tuesday, thanks to a right knee bone bruise. There's no timetable for his return, and he's scheduled to undergo further tests in the coming days.

That Travis was sidelined with the knee bruise was all the more confusing given he was forced to leave Sunday's game after being hit in the wrist by a pitch, and missed Monday's contest in Oakland ostensibly due to the wrist problem. Even Travis himself has no idea how or when he suffered the knee injury that ultimately sent him to the DL in shocking fashion; when he spoke with reporters about the injury Tuesday, the 26-year-old was visibly upset and at times seemed to be on the verge of tears.

"I never felt any pain at all," Travis said, according to Shi Davidi of Sportsnet. "I never even iced after the games. My knee has been feeling so good.

"I think there's one play that ... I want to say it had to have happened on, (but) I can't tell you for sure because I never felt any pain, like ever. There was never any sudden pain. My knee just locked up, and that was it."

Making matters potentially worse for Travis is the fact that his injured right knee is the same one he had surgery on over the winter.

This knee injury is just the latest in a long line of ailments that have plagued the 26-year-old since he joined the Blue Jays in 2015. While he's flashed his potential at the plate regularly in his three-year MLB career, Travis has been hit hard by the injury bug, including multiple shoulder and knee problems.

Before this latest mysterious knee ailment cropped up, Travis had shaken off a rough April to become one of the surging Blue Jays' hottest hitters in May. From May 1 through Sunday, he put up a .352/.363/.611 slash line with four homers, 16 doubles, and 17 runs scored.

Travis is the 18th Blue Jay to hit the disabled list this year.