Right-fielder Hunter Renfroe (.327) also was 3-for-5 with a run scored, but the Chihuahuas lost,16-7, to Round Rock at El Paso.
Blash, who left Saturday night's game with leg cramps, had two homers for four RBIs Sunday. He has three homers in his first eight at-bats with El Paso.
Dickerson was 2-for-5 with two runs scored and is hitting a system-leading .408.
Round Rock scored 43 runs to win the final three games of the four-game series at El Paso after the Chihuahuas won the opener. Round Rock scored 11 runs in the third inning Sunday.
Right-handed starter Daniel McCutchen (5-3, 7.66 ERA) allowed nine runs on 11 hits and a walk in 2 1/3 innings.
Right-hander Jose Dominguez (3.97) allowed four runs on four hits with three walks and three strikeouts in 1 2/3 innings. LHP Keith Hessler (3.60) struck out two in a scoreless fifth. RHP Adam Cimber (20.25) allowed three runs on six hits with a strikeout in six innings. RHP Leonel Campos (4.88) walked two and struck out two in a scoreless eighth.
First baseman James Loney pitched a scoreless ninth inning for El Paso and allowed a hit and a walk.
Right-handed pitcher Rafael De Paula was promoted from Double-A San Antonio to El Paso Monday morning.
Around the farm
DOUBLE-A SAN ANTONIO (13-29) -- FRISCO 7, Missions 1: DH Yeison Asencio (.273) was 2-for-4. Starting RHP Luis Diaz (2-4, 5.40 ERA) allowed five runs (four earned) on six hits and three walks with two strikeouts in three innings. RHP Eric Yardley (3.68) allowed two runs on three hits with a strikeout in three innings. RHP Eliot Morris (4.18) allowed a hit and a walk with a strikeout in two scoreless innings.
CLASS A ADVANCED LAKE ELSINORE (19-25) -- Bakersfield 6, STORM 4: 2B Luis Urias (.303) was 2-for-3 with a walk and two runs scored. 3B Josh VanMeter (.282) was 2-for-4 with a two-run homer. Starting RHP Chris Huffman (2.68 ERA) allowed three runs (one earned) on five hits and three walks with three strikeouts in 5 2/3 innings. LHP Brad Wieck (1.90) allowed a hit and two walks with two strikeouts in 2 1/3 scoreless innings. LHP Jose Torres (0-2, 2.95) gave up three runs on four hits and a walk with two strikeouts in an inning.
CLASS A FORT WAYNE (22-21) -- West Michigan 2, TIN CAPS 1: Starting RHP Jean Cosme (3.25 ERA) gave up four hits and a walk with four strikeouts in five scoreless innings. RHP Emmanuel Ramirez (5.74) allowed a run on a hit with two strikeouts in two innings. LHP Jerry Keel (1-4, 1.80) allowed an unearned run on two hits and a walk with two strikeouts in two innings to suffer the loss. 3B Carlos Belen (.223) was 2-for-4 and drove in the TinCaps lone run.