Waldron was recalled from Triple-A El Paso to start in Game 1 of Saturday's doubleheader with the Diamondbacks.

EDGE Analysis

After a decent performance during his first major-league start in June, Waldron will be called upon for his second test Saturday. The 26-year-old knuckleballer hasn't been outstanding in the minors, however, holding a 7.28 ERA and 1.63 WHIP through 85.1 innings. He will likely be optioned back to Triple-A after Saturday's games -- especially if he starts to get hit around by major-league batters.

Waldron was optioned to Triple-A El Paso on Thursday.

EDGE Analysis

Waldron didn't get into a game after getting the call a few days ago and has pitched in one game all year for the big club, giving up two earned runs in 4.2 innings on June 24 against Washington. Robert Suarez (elbow) was activated from the 60-day injured list in a corresponding move.

The Padres recalled Waldron from Triple-A El Paso on Sunday.

EDGE Analysis

San Diego played two Saturday and used a combined eight relievers across both games of the twin bill. Waldron will provide a fresh arm and should be able to handle multiple innings if necessary. The right-hander has worked primarily as a starter at Triple-A this season, pitching to a 7.02 ERA and 1.66 WHIP over 66.2 innings.

The Padres optioned Waldron to Triple-A El Paso on Friday.

EDGE Analysis

With the return of Steven Wilson (pectoral) from the injured list, Waldron will return to the minors to free up a spot in San Diego's bullpen. The 26-year-old knuckleballer has allowed two runs over 4.2 major-league innings, but his 7.02 ERA and 1.66 WHIP in Triple-A tell a different story about how his season has gone so far.

San Diego recalled Waldron from Triple-A El Paso on Tuesday.

EDGE Analysis

Waldron will rejoin the Padres in a long relief role ahead of Tuesday's game against the Angels. He made a spot start last month and scattered two earned runs on four hits and one walk over 4.2 innings.