The Blue Jays placed Bieber on the 15-day injured list Tuesday with right teres major inflammation, Arden Zwelling of Sportsnet.ca reports.
Bieber had shown no signs of being hurt, having allowed a combined two runs with a 12:2 K:BB over 13 innings covering his last two starts. The right-hander will be shut down from throwing for at least the next couple weeks after being diagnosed with a "mild-to-moderate" teres major injury, per Zwelling, so his absence will extend well beyond the 15-day minumum.