Houston Astros closer Roberto Osuna heard a chorus of boos Monday while making his first appearance in Toronto since being arrested on an assault charge in May.

The closer came into Monday night’s game to put the finishing touches on a 5-3 Astros victory. It was Osuna’s 19th save of the season.Osuna became a fan favorite during the 2015 season when, less than two years after undergoing Tommy John surgery, he took over closing games at the age of 20. 

Blue Jays manager John Gibbons called it “weird” to see Osuna on the mound at Rogers Centre wearing a different uniform. Osuna was traded to the Astros on July 30.

“Kind of mixed emotions, but I knew there was a good chance he was probably going to get it done,” Gibbons said. “I’ve seen him do it too many times.”

Osuna declined to speak on the advice of his lawyer. His case resumes Tuesday in Toronto.