Luis Castillo: Everything you need to know

Castillo tossed five innings against the Athletics on Tuesday, allowing two runs on five hits and two walks while striking out six batters. Castillo gave up a run in the first inning and another in the fourth but kept Seattle in the contest throughout his time in the game. The right-hander wasn't very efficient, however, as he needed 95 pitches to complete five frames. That was partly because he had his swing-and-miss stuff working -- Castillo recorded 14 whiffs, and his six punchouts were his second-most through five starts so far this season. The veteran hurler is still looking for his first victory, which he'll try to notch in what's projected to be a matchup versus Minnesota on the road his next time out.

Castillo (0-1) was tagged with the loss Thursday against the Padres, allowing four runs (one earned) on seven hits and three walks across 5.1 innings. He struck out three. Castillo came just two outs away from notching a quality start, but the veteran right-hander continues to struggle. After opening the season with six scoreless innings and seven Ks in a no-decision March 30, Castillo has given up 15 runs (11 earned) on 23 hits with a 10:5 K:BB across 12.1 frames in April. He's scheduled to make his next start next week at home against the A's.

Castillo allowed seven runs on 10 hits and one walk while striking out three batters over 3.1 innings in a no-decision against Houston on Saturday. The Mariners gave Castillo a two-run lead in the first inning, but the veteran hurler fell behind when Taylor Trammell cleared the bases with a three-run double in the second. Castillo gave up three more runs in the third and another in the fourth before being pulled with one out in the latter frame. After tossing six scoreless innings against the Yankees in his first start of the campaign, Castillo has surrendered 11 runs (10 earned) over seven frames across his past two starts. He'll try to get back on track in his next start, which lines up to be a road outing in San Diego.