On Friday, Hoyer watched the Padres' top prospect, right-hander Casey Kelly, in his first home start for the Missions.
Kelly allowed two runs (one earned) on three hits with one walk and two strikeouts in six innings in a no-decision against Northwest Arkansas.
Kelly, who was one of four players the Padres acquired from the Red Sox in the winter trade that sent first baseman Adrian Gonzalez to Boston, got 13 ground-ball outs in the game.
"He threw the ball well and got a lot of ground balls. He's still got a lot to work on but there's a lot to like," Hoyer said. "He knows what he has to do."
After two starts this season, the 21-year-old has a 3.48 ERA in 10 1/3 innings. Opposing teams are hitting .211 against him.