Castillo will serve as the opening pitcher for Friday's "bullpen day" game against the Athletics, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo has been on a roll in September, allowing just one earned run on three hits and two walks over six innings while recording six strikeouts. The 24-year-old right-hander is slated to give way Ryan Yarbrough after what most likely will be two frames at most Friday.

Castillo will serve as the Rays' opening pitcher in Monday's game against the Indians.

EDGE Analysis

It's the second "start" in three days for Castillo, who isn't expected to cover more than one or two innings before giving way to the bullpen. Rays manager Kevin Cash hasn't revealed if there will be a primary pitcher deployed behind Castillo, but Jalen Beeks represents the most likely option since he'll be available one five days' rest.

Castillo will serve as the opener for Saturday's game against the Orioles, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Castillo opened for the Rays on Sunday, tossing a scoreless frame while allowing one hit and striking out one against the Indians. He'll toss the usual 1-to-2 innings versus Baltimore before getting replaced by a long reliever.

Castillo will serve as opener for the Rays on Sunday, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

The right-hander (3.73 ERA in 41 innings) will throw the customary one or two innings to start things off before yielding to the long starter, who's expected to be Ryan Yarbrough but not confirmed. Castillo's three-run meltdown Aug. 29 halted a streak of seven scoreless appearances, and Cleveland -- who just acquired Josh Donaldson -- will present a tough test.

Castillo will open Wednesday's game against the Braves.

EDGE Analysis

Castillo turned in his seven scoreless appearance in a row in his last outing Sunday against the Red Sox, tossing a perfect frame. Since he has made the last two days to rest, the right-hander could be available to cover more than an inning to begin Wednesday's contest, but Jalen Beeks will be slated to pitch for most of the game in relief.

Castillo will likely be tabbed as the opener for Wednesday's "bullpen day" game, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

The right-hander has been stellar in August, generating a 1.38 ERA on the strength of eight scoreless efforts over nine appearances. Castillo has been utilized as both traditional reliever and "bullpen day" opener, and his workload has yet to exceed 2.2 innings in any one outing. The 24-year-old owns a solid 3.23 ERA and 1.05 WHIP across 39.0 innings this season, along with a 41:16 K:BB.

Castillo will open Friday's game against Boston with Jalen Beeks slated to see the bulk of the innings, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

This will be Castillo's second "start" against the Red Sox in less than a week after he opened against them Sunday. He tossed 1.2 scoreless innings, allowing just one hit in his previous outing. Look for Castillo to face a similarly limited number of batters Friday.

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

EDGE Analysis

It will be the first career start for the 24-year-old, who hasn't covered more than 2.2 innings in any of his 29 appearances in the big leagues this season. With that in mind along with the fact that Castillo tossed an inning in relief two days earlier, it's expected that he'll be capped at around one or two frames Sunday before giving way to Jalen Beeks, who will likely serve as the club's primary long reliever.

Castillo (3-2) earned the win Saturday by pitching 2.2 scoreless innings, working around one walk and one hit while striking out two in the Rays' victory over the Blue Jays.

EDGE Analysis

It's another brief outing that -- after Ryne Stanek pitched 1.1 frames -- a Rays reliever up for the victory, and Castillo recorded the most outs of any member of the Rays' six-man staff on the day. Castillo is no stranger to useful outings this season, compiling 12 holds and often pitching in late innings during high-leverage assignments. Although the right-hander has struck out 36 in 32.2 innings this season, the Rays' juggling of when he enters the game puts him outside the realm of logical fantasy value in most setups.

Castillo grabbed his fourth hold in Tuesday's win over the Nationals, firing a pair of scoreless innings in which he allowed a walk and recorded a strikeout.

EDGE Analysis

Castillo has proven an excellent addition to the Rays relief corps, as he now has a 1.46 ERA and 0.89 WHIP across 12.1 innings. The 24-year-old right-hander also boasts a 13:4 K:BB over that stretch, and he's also been credited with one victory. Moreover, Castillo has offered manager Kevin Cash some flexibility by pitching multiple innings as needed, something he's already been called on to do in five of his nine appearances.