Zimmer, No. 33 on the Top 100, was at the heart of Triple-A Columbus' 17-run outburst on Friday night, going 4-for-6 with a pair of doubles, three runs scored and an RBI. The four-hit performance improved the 23-year-old outfielder's Triple-A average to .357 through 11 games, and he's hitting .264 through 104 games for the season.
Adams, 21, enters the day with a perfect 12-0 record, having won seven of his nine starts since being promoted to Double-A Trenton. The 2015 fifth-rounder has been outstanding so far in his first full season, posting a 2.41 ERA, a 0.89 WHIP and a 123-33 strikeout-to-walk ratio in 108 1/3 innings (21 starts) between the Class A Advanced and Double-A levels. Opposing hitters, meanwhile, are batting just .166 against the right-hander.
Last week was a busy one for Castillo, who was traded from Miami to San Diego as part of the Andrew Cashner deal, only to be dealt back to the Marlins after acquired hurler Colin Rea suffered an elbow injury in his first start for the Fish. The 23-year-old right-hander, who boasts a fastball that reaches triple digits, has opened eyes in his first full season as a starter, posting a 2.25 ERA, a 0.97 WHIP and an 84-15 strikeout-to-walk ratio over 100 innings (20 games/18 starts) for Class A Advanced Jupiter.
Speaking of right-handers with triple-digit heaters, Alcantara is set to make his second start for Class A Advanced Palm Beach after struggling in his debut last week. The 20-year-old was bumped up to the Florida State League after an impressive showing at Class A Peoria, where he recorded a 4.08 ERA and was tied for the Midwest League lead with 119 strikeouts in 90 1/3 innings.
Saturday's Top 100 prospect probables
No. 4 Lucas Giolito (Nationals' No. 1), Syracuse at Scranton/Wilkes-Barre (7:05 p.m. ET on MiLB.TV)
No. 9 Alex Reyes (Cardinals' No. 1), Memphis vs. Omaha (7:35 p.m. ET on MiLB.TV)
No. 41 Jose De Leon (Dodgers' No. 3), Oklahoma City vs. Round Rock (8:05 p.m. ET on MiLB.TV)
No. 47 Riley Pint (Rockies' No. 4), Grand Junction vs. Missoula (9:05 p.m. ET on MiLB.TV)
No. 85 Mitch Keller (Pirates' No. 5) vs. Ofelky Peralta (Orioles' No. 13), West Virginia at Delmarva (7:05 p.m. ET)
More top prospect probables
Chad Kuhl (Pirates' No. 7), Indianapolis vs. Toledo (Triple-A) Daniel Mengden (A's No. 13), Nashville at Colorado Springs (Triple-A)
Taylor Clarke (D-backs' No. 5), Mobile at Mississippi (Double-A)
Kohl Stewart (Twins' No. 6), Chattanooga vs. Jacksonville (Double-A)
Conner Greene (Blue Jays' No. 10), New Hampshire vs. Erie (Double-A)
Ariel Jurado (Rangers' No. 10), Frisco at San Antonio (Double-A)
Josh Staumont (Royals' No. 11) vs. Chase De Jong (Dodgers' No. 18), Northwest Arkansas vs. Tulsa (Double-A)
Clay Holmes (Pirates' No. 12) vs. Ricardo Pinto (Phillies' No. 17), Altoona at Reading (Double-A) Jason Garcia (Orioles' No. 15), Bowie vs. Richmond, Game 2 (Double-A)
Jen-Ho Tseng (Cubs' No. 26), Tennessee vs. Montgomery (Double-A)
Fernando Romero (Twin's No 8), Fort Myers at Charlotte (Class A Advanced)
Cody Ponce (Brewers' No. 11) vs. Francisco Rios (Blue Jays' No. 16), Brevard County vs. Dunedin (Class A Advanced)
Jordan Stephens (White Sox No. 11), Winston-Salem vs. Frederick (Claas A Advanced)
Zack Littell (Mariners' No. 14), Bakersfield at Lake Elsinore (Class A Advanced)
Mike Soroka (Braves' No. 6), Rome vs. Columbia (Class A)
Tony Santillan (Reds' No. 13), Dayton at Lake County (Class A)
Scott Blewett (Royals' No. 13) vs. Jonathan Hernandez (Rangers' No. 23), Lexington vs. Hickory (Class A)
Justin Jacome (Marlins' No. 21), Greensboro vs. Kannapolis (Class A) Jesus Tinoco (Rockies' No. 24), Asheville vs. Augusta (Class A)
Pedro Avila (Nationals' No. 26), Hagerstown at Lakewood (Class A) Sam McWilliams (D-backs' No. 28), Kane County at Wisconsin (Class A)
Keegan Akin (Orioles' No. 8), Aberdeen at Connecticut (Class A Short Season)
Dakota Chalmers (A's No. 9), Vermont vs. State College (Class A Short Season)
Aaron Civale (Indians' No. 18), Mahoning Valley at Hudson Valley (Class A Short Season)
Mike Shawaryn (Red Sox's No. 23), Lowell at Staten Island (Class A Short Season)
JoJo Romero (Phillies' No 26), Williamsport at West Virginia (Class A Short Season) Jose Espada (Blue Jays' No. 20), Bluefield vs. Danville (Rookie)
Garrett Davila (Royals' No. 20), Burlington at Kingsport (Rookie)
Mike Rosenbaum is a reporter for MLB.com. Follow him on Twitter at @GoldenSombrero. This story was not subject to the approval of Major League Baseball or its clubs.