Castillo (5-6) earned the win over Washington on Monday, allowing three runs (two earned) on seven hits and one walk while striking out seven batters over seven innings.

EDGE Analysis

Castillo allowed a solo homer in each of the first and second frames but settled down thereafter and finished his outing by retiring the final seven batters he faced. The right-hander racked up an impressive 17 swinging strikes and tied his season high by completing seven frames. The victory snapped a personal four-game losing streak for Castillo, though he had maintained a decent 3.42 ERA and 1.23 WHIP during that stretch. Though the veteran's record is just 5-6 on the season, he's been very effective with a 2.86 ERA, 1.06 WHIP and 108:28 K:BB over 94.1 innings.

Castillo (4-6) took the loss against the Yankees on Wednesday, allowing three runs on four hits and four walks while striking out three batters over five innings.

EDGE Analysis

Though Castillo yielded just four hits, two of those left the yard, and he also issued four walks. The last number is particularly concerning because it comes on the heels of the season-high six walks he issued against Miami in his previous outing. Prior to the pair of wild performances, Castillo hadn't handed out more than two free passes in any of his first 13 appearances of the season. The right-hander has now lost each of his past four starts, though that's partly due to poor run support, as he's posted a respectable 3.42 ERA over that span. Castillo will look to get back in the win column -- and to exhibit better control -- in his next outing, which is tentatively lined up to come at home against Washington.

Castillo (4-5) allowed two runs on two hits and six walks while striking out six over 5.2 innings to take the loss Wednesday versus the Marlins.

EDGE Analysis

Castillo hadn't walked more than two batters in any of his starts this season, so it's safe to call this one an anomaly. Despite the lackluster control, he still turned in a decent effort, though it was also his third straight loss. All five of his losses have come in his last seven outings. Castillo still has an excellent 2.73 ERA with a 1.02 WHIP and 98:23 K:BB over 82.1 innings across 14 starts this season. He'll look to regain his command in his next start, tentatively scheduled to be on the road versus the Yankees next week.

Castillo (4-4) allowed five runs (three earned) on six hits and a walk while striking out 10 over six innings, taking the loss Friday versus the Angels.

EDGE Analysis

This was Castillo's second 10-strikeout effort of the season, both of which have come in his last three starts. He also gave up multiple home runs for the second time this year, and the five runs allowed were the second-highest total he's given up. All in all, it was a middling performance for the Mariners' ace, who now has a 2.70 ERA, 0.99 WHIP and 92:17 K:BB through 76.2 innings across 13 starts. He's projected for a home start versus the Marlins next week.

Castillo (4-3) yielded one run on five hits and a walk over seven innings Friday, striking out six and taking a loss against Texas.

EDGE Analysis

Castillo fired five shutout frames before finally coughing up a run in the sixth. The Mariners were shut out, resulting in him taking his first loss since May 16. He's posted a 24:5 K:BB while giving up just one run over his last three starts. Castillo had allowed 12 earned runs over his previous three outings and now owns 2.55 ERA. He's lined up to face the Angels on the road next week.

Castillo (4-2) earned the win Saturday, allowing one hit and two walks over six scoreless innings during a 5-0 win over Pittsburgh. He struck out 10.

EDGE Analysis

Castillo completed six scoreless innings for a second straight game and struck out a season-high 10 batters Saturday. Before his dominating two-game stretch, the Mariners' ace allowed 17 earned runs over his previous five starts, so fantasy managers can breathe a sigh of relief, as it appears Castillo has regained his elite form. Despite the tough stretch, the right-hander still sports strong season-long numbers (2.69 ERA, 0.99 WHIP and 76:15 K:BB over 63.2 innings) and remains one of the best pitchers in MLB.

Castillo (3-2) earned the win Monday over the Athletics, allowing four hits and two walks while striking out eight over six scoreless innings.

EDGE Analysis

The Mariners had an 8-0 lead when Castillo exited the contest, allowing him to cruise to a win after he was tagged for seven runs in five innings in his last start. Castillo kept runs off the board in three of his first four starts of the season, but had given up 14 runs (12 earned) across his three most recent efforts before bouncing back Monday. He now has a 2.97 ERA, 1.04 WHIP and 66:13 K:BB through 57.2 innings this season. Castillo is projected for a home start versus the Pirates this weekend.

Castillo (2-2) took the loss Tuesday, coughing up seven runs (five earned) on six hits -- including three home runs -- and two walks over five innings as the Mariners were downed 9-4 by the Red Sox. He struck out six.

EDGE Analysis

Boston jumped on the right-hander for four runs in the first inning, and after he'd seemed to right the ship, Castillo gave up three more in the fifth. All six hits off him went for extra bases, with Justin Turner, Triston Casas and Jarren Duran all taking him deep. After a great start to the season, Castillo has fallen into a funk, going five straight outings without recording a quality start and posting a 5.67 ERA and 1.44 WHIP over that stretch despite a 32:7 K:BB through 27 innings. He'll get a golden opportunity to turn things around in his next trip to the mound, however, as he's likely to face the A's at home early next week.

Castillo (2-1) took the loss Wednesday, giving up three runs on eight hits over five innings as the Mariners fell 4-3 to the Rangers. He struck out nine without walking a batter.

EDGE Analysis

An elevated pitch count led to a relatively early exit, but Castillo was dominant while on the mound and generated 34 called or swinging strikes among his 98 pitches. While he no longer sports an unblemished record, the 30-year-old righty will still take a 2.70 ERA, 0.99 WHIP and 52:9 K:BB through 46.2 innings into his next outing, which is likely to come early next week in Boston.

Castillo did not factor into the decision Friday, allowing four runs on five hits and one walk over seven innings against the Astros. He struck out five.

EDGE Analysis

Castillo turned in another solid outing, pitching seven innings for the second time this year. The right-hander now sports a 0.91 WHIP, tied for ninth in the league. The former Red is firmly established as an elite option ahead of his next tentative start against Texas.