Castillo will serve as the opener for Saturday's game against the Indians, Josh Tolentino of The Athletic reports.

EDGE Analysis

Castillo is set to toss the first inning or so before making way for Jalen Beeks, who's set to serve as the primary pitcher. Castillo owns a 3.76 ERA with 60 strikeouts across 52.2 innings this season.

Castillo (2-7) took the loss after allowing one run on three hits while striking out two over two innings Sunday against the Orioles.

EDGE Analysis

Castillo gave up an RBI single in the first inning, and he'd ultimately be hit with the loss in an 8-3 series finale. He owns a 3.48 ERA and 1.32 WHIP with a 60:21 K:BB over 51.2 innings this season, though he's surrendered three runs over his last two appearances (three innings).

Castillo will work as an opener Sunday against the Orioles, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo will once again work ahead of primary pitcher Jalen Beeks in Sunday's series finale. Castillo allowed two earned runs during his last outing Tuesday, ending a stretch of 10 straight innings without surrendering an earned run.

The Rays will deploy Castillo as an opener ahead of bulk reliever Jalen Beeks in Tuesday's game against the Mariners, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo has worked as an opener on three occasions this season, covering an inning each time and yielding one unearned run. The right-hander hasn't been quite as dominant in 2019 as he was last season, but he's been sharp since returning from the injured list coming out of the All-Star break. In his 16 second-half outings, Castillo has posted a 1.26 ERA and 18:5 K:BB in 14.1 innings.

Castillo served as the opener in a win against the Padres on Monday, allowing an unearned run on two hits in one inning.

EDGE Analysis

Castillo hasn't allowed an earned run in eight straight appearances, but he did get into some trouble Monday when Matt Duffy's error allowed leadoff hitter Fernando Tatis Jr. to reach. Eric Hosmer eventually doubled him home. Castillo was nevertheless sharp in terms of location, throwing 13 of 16 pitches for strikes and inducing five groundballs overall. Despite the slight stumble Monday, Castillo has been mostly reliable since a rough June (eight earned runs allowed over five innings), generating a 1.74 ERA across the 10.1 innings encompassing the 13 appearances he's logged since that point.

Castillo will serve as an opener in Monday's game against the Padres.

EDGE Analysis

Castillo has only worked two innings as an opener this season, allowing a hit and no runs over that span. The right-hander heads into Monday's outing with a seven-appearance scoreless streak, a stretch during which he's recorded a victory, two holds and a save.

Castillo (2-6) earned the win Tuesday against the Blue Jays by allowing zero baserunners and recording one strikeout during a scoreless 10th inning.

EDGE Analysis

Castillo had no issues during the top of the 10th inning, delivering nine of his 13 pitches for strikes to retire the side in order. The 25-year-old has a 1.93 ERA, 1.50 WHIP and 11:4 K:BB with one save and three holds in his last 12 outings.

Castillo will serve as the opener Saturday against the Marlins, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo worked as an opener last Friday for the first time this season and delivered a perfect first inning. The 25-year-old has a 3.73 ERA, 1.37 WHIP and 47:19 K:BB through 41 innings and is 8-for-9 in save opportunities working in a flexible role for the Rays.

Castillo picked up the save after fanning two across 0.2 innings Sunday against Toronto.

EDGE Analysis

Castillo was called on with one out in the bottom of the ninth in a one-run ballgame, and he was able to secure the victory by retiring the final two batters via the strikeout. This marks the 25-year-old's first save since June 16, as he's slotted into a variety of roles lately for the Rays. Castillo served as the opener for Friday's clash.

Castillo served as the opener in Friday's win over the Blue Jays and fired a perfect first inning. He did not record any strikeouts during the appearance.

EDGE Analysis

Manager Kevin Cash decided to give Castillo a change of scenery of sorts, rolling him out as an opener for the first time this season. The 25-year-old responded in fine fashion, bouncing back from a hiccup against the Red Sox in his prior outing when he'd allowed two earned runs on two hits without getting an out on Tuesday. Outside of that bump in the road, Castillo has been much steadier since returning from a shoulder injury to open the second half, generating scoreless efforts in his five other post-All-Star-break outings.