TORONTO -- Numerous times on Thursday afternoon, a Blue Jays batter would arrive at first base following a single or a walk and jokingly touch the jersey of Orioles first baseman Ryan Mountcastle.

They all wanted some of Mountcastle¡¯s success at the plate to rub off on them.

Baltimore¡¯s first baseman has tormented Toronto for years, and he¡¯s practically made Rogers Centre a second home over his four big league seasons. But Mountcastle¡¯s performance over this week¡¯s four games at the ballpark was stellar, even by his standards.

By going 4-for-4 in Baltimore¡¯s 6-1 series-clinching win on Thursday, Mountcastle completed the set with an .846 average, going 11-for-13 and reaching base in 14 of his 18 plate appearances. It¡¯s the highest batting average for any player in Orioles history over a four-game series (minimum 10 plate appearances) and the second highest in a series of at least three games -- Hall of Famer Harold Baines (.889) ranks first, as he went 8-for-9 vs. the Royals from April 30-May 2, 1993.

¡°Maybe it¡¯s something here in Toronto that [Mountcastle] likes, whether it¡¯s Tim Hortons, poutine or the backdrop here. Who knows?¡± Blue Jays manager John Schneider said. ¡°He had a really good series, and he¡¯s a good player.¡±

The 26-year-old Mountcastle is a career .333 hitter at Rogers Centre (27-for-81) with seven doubles, six homers, 21 RBIs and a 1.046 OPS.

¡°They¡¯re not going to let him back in here,¡± Orioles manager Brandon Hyde said. ¡°I¡¯m going to put a massive Rogers Centre banner in his locker to remind him of what it feels like when he hits here. There¡¯s some intent in that swing, and if he can swing the bat somewhat like this the rest of the way, we¡¯re in good shape.¡±

Earlier in the summer, Mountcastle wasn¡¯t swinging the bat anything like this. But he was also dealing with vertigo, which inhibited his performance and eventually caused him to go on the injured list from June 13-July 9.

Since returning, Mountcastle is 23-for-50 (.460) with seven doubles, two homers and 10 RBIs over 18 games.

¡°It¡¯s easier when you¡¯re just seeing one baseball instead of three at the plate,¡± Mountcastle said. ¡°I feel a lot better and healthy, and it¡¯s a blessing.¡±

It¡¯s simple for Mountcastle to explain why he can hit better when he doesn¡¯t have vertigo. However, he can¡¯t break down why his offensive game seemingly reaches another level in Canada.

¡°Maybe it just lines up with when I¡¯m hitting well or whatnot, I don¡¯t know,¡± Mountcastle said. ¡°But they¡¯ve got a good staff over there, and I just laid off some good pitches and got the good ones to hit.¡±

Whatever the reasoning, the Orioles aren¡¯t going to question it -- but they¡¯ll grin about it.

¡°Dude, he was unconscious this series. It was fun to watch,¡± catcher Adley Rutschman said. ¡°I feel like he does that every time he goes to Toronto, though. So I think it's just a running joke now. Awesome to see him do his thing.¡±