Estrada was bumped from Sunday's start after receiving a stem-cell injection to his lower back, Mike Wilner of Sportsnet 590 The Fan reports.

Estrada received the treatment following Monday's start against the Astros, so he will not pitch in Sunday's season finale. The 35-year-old will finish the season with a 5.64 ERA and 1.42 WHIP in 28 starts and is likely done as a Blue Jay as he enters free agency in 2019.

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