Waldron surrendered one run on two hits and no walks while striking out two batters over two innings in a Cactus League contest against Oakland on Saturday.
Waldron said Wednesday that he is planning to throw his knuckleball more frequently during the upcoming season, AJ Cassavell of MLB.com reports.
Waldron was recalled from Triple-A El Paso on Sunday.
Waldron came away with a no-decision in Saturday's 9-8 extra-inning win over the Marlins, surrendering five runs on five hits and two walks over 4.1 innings. He struck out five.
Waldron (7-9) got the win over the Rockies on Sunday, allowing one run on two hits and two walks while striking out seven over 5.2 innings.
Waldron did not factor into the decision in Tuesday's win over the Dodgers, allowing five runs on five hits and a walk while striking out six over four innings.
Waldron (5-9) took the loss Friday as the Padres fell 7-0 to the Guardians, allowing one run on six hits over six innings. He struck out five without walking a batter.
Waldron did not factor into the decision in a loss to the Diamondbacks on Saturday, allowing three runs on five hits and two walks over six innings while striking out six.
Waldron (5-7) took the loss Sunday against the Red Sox. He gave up four runs (three earned) on six hits, one walk and three strikeouts over 4.1 innings.
Waldron (5-6) picked up the win in Wednesday's 5-2 victory over the Phillies, allowing one run on five hits and two walks over seven innings. He struck out six.