MLB Trade Rumors Angel Zerpa were both optioned to the minor leagues, while a third southpaw, Eric Skoglund, was reassigned to minor league camp. Both Tillo and Zerpa are on the Royals’ 40-man roster. Though both Tillo and Zerpa are on the 40-man, neither seemed particularly likely to make the roster out of camp. The 24-year-old Tillo made it as high as Double-A in 2019, throwing 23 1/3 innings for Northwest Arkansas with a 3.47 ERA/3.62 FIP. He has been rehabbing from Tommy John surgery, notes the Athletic’s Alec Lewis (via Twitter). Fangraphs has Tillo as the Royals’ 38th-ranked prospect. Zerpa, meanwhile, is a 21-year-old southpaw out of Venezuela who has yet to play above rookie ball.