Racing PositionsDiamondbacks designate Lamb for assignment4MThe guy with the most to prove in 2020 for all 30 MLB teams7MBuster OlneySource: Peralta, D-backs agree to 3-year deal1YDodgers' May struck by liner, avoids serious injury1YDiamondbacks reinstate Lamb from IL, option Leyba2YD-backs' Lamb (quad) expected to miss 6 weeks2YLamb 'ready to go' after move from 3rd to 1st2YD-backs avoid arbitration with Ray, Lamb, 4 others2YSurgery likely to end D-backs 3B Lamb's season2YSurgery an option for Diamondbacks 3B Lamb2Y