Manager Alex Cora told reporters Sunday that Jansen is likely to be placed on the 15-day injured list Monday due to a right shoulder injury, Chris Cotillo of MassLive.com reports.
Jansen has been battling through a nagging right shoulder issue over the past week, and the 36-year-old closer is set to be shut down for the rest of the regular season. Chris Martin and Justin Slaten will handle the closing duties for the final games of the regular season with Jansen sidelined. Jansen finishes his second year in Boston with 27 saves while registering a 3.35 ERA, 1.08 WHIP and 61:20 K:BB across 53.2 innings, and he will be a free agent this offseason.