Shawn Kelley (elbow) on Thursday threw his first bullpen session since undergoing partial Tommy John surgery. "I threw my first bullpen (session) from the rubber (Thursday), 27 fastballs, and feel great today," Kelley said. "On Sunday I'll throw a full bullpen - I'll throw sliders and change-ups along with fastballs." Kelley is expected to need an additional bullpen session after Sunday and then a simulated game before going out on a rehab assignment. The M's hope to have him back by mid-August.