Castillo fired a perfect eighth inning in a win over the Twins on Tuesday, recording a strikeout.

EDGE Analysis

The veteran right-hander got through his one frame on a crisp 13 pitches, eight which found the strike zone. Castillo has rebounded from a brief rough stretch in the latter part of May to put together nine consecutive scoreless appearances, a sample during which he's allowed just one hit, posted a 16:1 K:BB, recorded two victories and saves apiece and lowered his ERA and WHIP from 9.00 and 2.15 to 5.09 and 1.30, respectively.

Castillo picked up the save Wednesday against Houston. He struck out three with zero hits or walks during a scoreless ninth inning.

EDGE Analysis

Castillo entered with a three-run lead in the ninth inning to face the bottom of the Astros' order, and he struck out the side in en route to his fourth save of the season. Paul Sewald, who has been operating as the Mariners' top closing option, pitched in the eighth inning, but he had to face Yordan Alvarez, Kyle Tucker and Yuli Gurriel. Despite Castillo getting the save opportunity over Sewald, it appears that Sewald is still the go-to guy for the highest-leverage moments.

Castillo earned a save against the Astros on Monday, allowing one walk in a scoreless ninth inning.

EDGE Analysis

Paul Sewald has taken over primary closer duties for Seattle of late, but he had pitched three of the past four days entering Monday and appeared to be unavailable. Castillo stepped in to close the door, preserving a three-run ninth-inning lead and allowing only a two-out walk. The right-hander has three saves on the campaign, but this was his first since May 15. He's pitched seven consecutive scoreless innings but still has an ugly 5.85 overall ERA due to a few blowups.

Castillo (3-0) was credited with the win in an extra-inning victory over the Rangers on Sunday, allowing a hit and recording three strikeouts in a scoreless ninth inning.

EDGE Analysis

The veteran reliever extended his strong stretch of pitching with an ultra-sharp outing that saw him get 10 of his 14 offerings into the strike zone. Castillo has now strung together five straight scoreless appearances and accomplished the feat in seven of the last eight trips to the mound overall, with his last two outings also resulting in victories.

Castillo (2-0) was credited with the win in an extra-inning victory over the Orioles on Thursday, firing two perfect innings during which he recorded three strikeouts.

EDGE Analysis

Castillo got his six outs on an efficient 26 pitches and had no trouble protecting a one-run lead forged by the Mariners in the visitors' half of the 10th inning. The veteran reliever has seemingly rediscovered his form after a stretch where he allowed multiple earned runs in three of five appearances, following that rough patch up with five perfect frames across four outings during which he's generated an 8:0 K:BB.

Castillo earned his first hold by striking out the side in a perfect eighth inning during a win over the Athletics on Monday.

EDGE Analysis

Castillo's 18-pitch outing featured 13 strikes and a much-needed show of dominance from the struggling veteran. Castillo had allowed multiple earned runs in three of the previous five appearances but still has manager Scott Servais' trust to an extent, considering he was deployed as a set-up option Monday with Seattle holding a one-run lead.

Castillo, who allowed two earned runs on two hits over two-thirds of an inning in a loss to the Red Sox on Friday, has now allowed multiple earned runs in three of his last five appearances.

EDGE Analysis

There's 1.2 scoreless frames and a save nestled within that sample, which came in the two appearances immediately preceding Friday's stumble. However, Castillo has been faltering far too often for manager Scott Servais' and fantasy managers' liking of late, seemingly making him a shaky candidate for any consistent ninth-inning work for the time being.

Castillo allowed no hits and a walk while striking out two in two-thirds of a scoreless inning to earn the save in Sunday's win over the Mets.

EDGE Analysis

Drew Steckenrider earned the save Friday against the Mets and entered Sunday's game in the ninth inning to preserve a three-run lead. However, Castillo was brought into the game after Steckenrider gave up two runs on four hits and no walks in one-third of an inning. Castillo had given up nine runs in one inning over his last three appearances, but he held the Mets scoreless Sunday to pick up his second save of the year. Although it was encouraging to see the right-hander earn the save Sunday, the Mariners have used a pure committee-based approach for closing duties this season, and Castillo has had just two save opportunities.

Castillo allowed three earned runs on five hits over two-thirds of an inning in a loss to the Phillies on Monday. He struck out one.

EDGE Analysis

Castillo has now put together back-to-back nightmarish appearances, as he also failed to record an out while giving up five earned runs to his old Rays squad Saturday. The sudden slump has ballooned Castillo's previously tidy 2.70 ERA to an unwieldy 9.28. While his career body of work strongly suggests he'll work himself out of the skid in short order, the veteran's one save and zero holds have dinged his fantasy value significantly over the first month-plus of the season.

Castillo allowed three earned runs on five hits over two-thirds of an inning in a loss to the Phillies on Monday. He struck out one.

EDGE Analysis

Castillo has now put together back-to-back nightmarish appearances, as he also failed to record an out while giving up five earned runs to his old Rays squad Saturday. The sudden slump has ballooned Castillo's previously tidy 2.70 ERA to an unwieldy 9.28. While his career body of work strongly suggests he'll work himself out of the skid in short order, the veteran's one save and zero holds have dinged his fantasy value significantly over the first month-plus of the season.