Castillo allowed one hit and struck out one in the ninth inning Sunday against the Red Sox on the way to the save.

EDGE Analysis

Castillo fanned the first batter of the inning, and after surrendering a hit to Rafael Devers, he retired the final two hitters to secure his third save of 2019. While Jose Alvarado remains the top option for saves, Castillo has shown that he's capable of slamming the door when necessary. The 25-year-old owns a 2.70 ERA with 16 strikeouts over 14.1 innings this season.

Castillo (0-1) allowed an earned run on three hits over an inning in an extra-innings loss to the Orioles on Thursday.

EDGE Analysis

Jose Alvarado had already worked a clean 10th in which he struck out the side, so manager Kevin Cash rolled Castillo out for the 11th inning Thursday. The normally reliable reliever worked himself into trouble by allowing consecutive singles afer retiring the first two batters, and he ultimately allowed a tie-breaking RBI double to Joey Rickard. That represented the first earned run given up this season by Castillo, who hadn't even allowed a hit in six of his previous seven appearances.

Castillo struck out one in a perfect ninth inning Tuesday to record his second save of the season in a 4-2 win over the Orioles.

EDGE Analysis

Jose Alvarado worked the eighth inning, so this wasn't a case of the Rays' closer being unavailable. Castillo has yet to allow a run this season through 10 innings with a 10:3 K:BB, and while he'll primary work in a setup role -- he has five holds to go with his two saves -- manager Kevin Cash isn't afraid to switch his two dominant relief options around if the matchups seem to call for it.

Castillo fired a perfect ninth inning in a win over the Rockies on Monday, striking out the side on 14 pitches.

EDGE Analysis

The 25-year-old has opened the season in fine form, with Monday's outing his third scoreless effort in as many appearances. Castillo has allowed just a pair of hits and issued Monday's walk in that sample, and with his elite fastball, he could be see a fair amount of ninth-inning opportunities this season as a right-handed closing complement to southpaw Jose Alvarado.

Castillo worked a scoreless third inning in an exhibition loss to the Phillies on Monday, allowing a hit and a walk while striking out two.

EDGE Analysis

Castillo was getting some work in prior to the start of the regular season in what was essentially a bullpen day for the Rays. The 25-year-old right-hander figures to play a pivotal and diverse relief role in 2019 after compiling 10 holds over 43 appearances last season, including 11 games as an opener. Castillo endured some rocky moments this spring, but Monday's solid outing lowered his exhibition ERA to 3.86 over nine appearances.

Castillo, who was a valuable bullpen asset for most of 2018, is ready to adapt to a multitude of possible roles this season, Juan Toribio of MLB.com

EDGE Analysis

The hard-throwing right-hander was a jack-of-all-trades component of the pitching staff last season, notching 10 holds but also logging 11 starts by serving as the opener in manager Kevin Cash's signature "bullpen days". Castillo racked up 65 strikeouts over 56.2 innings, although his 2.9 BB/9 was the second highest of his professional career. Cash has said it's "fair" to assume Castillo will have opening duties on occasion again this season, but his high-90s fastball makes him a natural fit for late-inning work as well.

Castillo (4-2) earned the win Saturday despite allowing one run in two relief innings against the Blue Jays. He worked around a solo home run and struck out four.

EDGE Analysis

The right-hander has often served as opener, but in this one, he sniped a win, so to speak, from AL Cy Young contender -- if not favorite -- Blake Snell, who went five innings. Castillo brings a solid 3.13 ERA into the finale, complemented by a 10.0 K/9 and 3.00 BB/9 in 43 appearances (56.2 innings).

Castillo will be the Rays' opener Monday against the Yankees, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo has been the Rays' first pitcher on 10 occasions so far this season, averaging 1.5 innings in those appearances. Ryan Yarbrough will throw the bulk of the innings Monday.

Castillo will serve as the Rays' opening pitcher in Friday's game against the Blue Jays.

EDGE Analysis

Castillo has been electric over his last three appearances, tossing 4.2 scoreless frames while allowing just one hit and striking out eight. He'll likely be limited to between one and two innings Friday before giving way to the bullpen, with Jalen Beeks expected to work the longest among the relievers manager Kevin Cash calls upon.

Castillo will serve as the Rays' opening pitcher in Sunday's game against the Athletics, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo will pick up his eighth "start" of the season and second of the series after tossing two perfect frames and striking out four as the Rays' opener Friday. Jalen Beeks will likely be deployed as the primary pitcher behind Castillo, though the expanded roster will enable the Rays to mix and match out of the bullpen more than they were able to prior to September.