Cory Rasmus to have surgery for core injury, out 6-8 weeks By D.J. ShortMar 21, 2015, 3:14 PM EDT 6 Comments Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Flipboard (Opens in new window)Click to share on Reddit (Opens in new window)Click to email this to a friend (Opens in new window) Rasmus, 27, had a 2.57 ERA and 57/17 K/BB ratio across 56 innings last season. [more]