Both pitchers have one more rehab start with Triple-A Tucson before they rejoin the Padres.
The Padres want to get a look at both over the final four weeks of the season. But the question is, who will they replace in the Padres rotation?
While the Padres have gone 9-1 over the past 10 games, the six starting pitchers they have used have gone 8-1 with a collective 1.64 ERA and an opponents' batting average of .202.
Here's a pitcher-by-pitcher breakdown of the last two times through the rotation.
--RHP Casey Kelly: 1-0, 0.00 ERA in one start -- No runs allowed on three hits and two walks with four strikeouts over six innings.
--LHP Eric Stults: 2-0, 0.00 ERA in two starts -- One unearned run allowed on eight hits and three walks with nine strikeouts in 13 innings.
--LHP Clayton Richard: 2-0, 1.69 ERA in two starts -- Four runs (three earned) allowed on 12 hits and two walks with five strikeouts over 16 innings.
--RHP Edinson Volquez: 2-0, 1.98 ERA in two starts -- Three runs allowed on nine hits and five walks with 17 strikeouts over 13 2/3 innings.
--LHP Andrew Werner: 1-1 with a 3.00 ERA in two starts -- Four runs allowed on eight hits and four walks with nine strikeouts over 12 innings.
--RHP Jason Marquis: 0-0, 5.07 ERA in one start -- Three runs allowed on seven hits and two walks with three strikeouts over 5 1/3 innings.
Kelly replaced Marquis in the rotation after Marquis suffered a broken bone at the base of his left thumb when he was struck by a line drive on Aug. 21. Team physicians have advised Marquis against trying to pitch again this season before the bone totally heals.
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