"I think he's definitely gonna play in the big leagues for a long time," said Lake Elsinore hitting coach Jody Davis, a former big league catcher. "San Diego needs the offense. They're not scoring a lot of runs. And he can definitely produce runs."
Renfroe, a 2013 first-round pick, homered in his second game with the Missions and has a combined slash line of .284/.360/.547 with both teams in 2014.
"I'm just seeing the ball a lot better," Renfroe said. "The balls are coming easy to me now since the first part of the year, when I kind of struggled a little and was striking out a good bit."
Guerrero, one of two Colombians selected to the World Team, starred out of Fort Wayne's (Class A) bullpen in the first half this season before he was also promoted last week to Lake Elsinore.
Guerrero, who signed with the Padres as a non-drafted free agent in December 2009, has racked up 44 strikeouts in 37 2/3 innings (27 games) this year to go along with his 6-1 record and 0.96 ERA. He was selected to the Midwest League's Mid-Season All-Star squad before his promotion.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. Will Laws is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.