The least pedigreed player on this list, Ray Kerr is not someone to be forgotten amidst the plethora of elite bullpen prospects found in the Seattle system. A true success story of the pitching development, Kerr once spent three straight years in then High-A Modesto with middling results. Fortunately for Kerr, the new “Gas Camp” program did wonders for him. Suddenly throwing in the upper-90’s from the left side, Kerr was converted to a high-leverage reliever full time this year.
Kerr sits comfortably in the upper-90s and has hit as high as 102 MPH this minor league season. Paired with a wipeout slider from the left side, Kerr has the makings of a special kind of reliever.
Anyone of these three players could easily be called up in the next coming days, but if not, the Mariners’ bullpen for the coming years looks to be in excellent shape. Watch out AL West, the Mariners’ ‘pen isn’t one to be messed with.