A sixth-round pick in 2014, the 24-year-old Stewart is 3-0 with a 2.89 ERA at Triple-A with 27 strikeouts and only two walks in 18 2/3 innings. Combined this year, he is 8-3 with a 1.47 ERA.
"He's pitched well up to Triple-A. Yeah, I mean, I hear good things," Roberts said. "He might be, if you look at what we have internally and guys that have performed, like I said yesterday, a lot of things are on the table. The way Brock has performed to this point … if it were to happen, that's a big jump. Obviously, if we feel he's ready, that's the decision we'll make."
Roberts said it won't be Hyun-Jin Ryu, Brandon McCarthy, Ross Stripling or Mike Bolsinger. It wouldn't be Minor Leaguers Jose De Leon or Jharel Cotton, unless they are brought back on short rest.
Carlos Frias, listed as the Monday night starter for OKC, might be the most deserving, but he would need to replace a player on the disabled list because he was optioned June 21 when the Dodgers called him up for two days and didn't use him.
Ken Gurnick has covered the Dodgers since 1989, and for MLB.com since 2001. This story was not subject to the approval of Major League Baseball or its clubs.