Winker recorded four hits on Tuesday for the second time this season, going 4-for-5 with four runs scored and two RBIs in Triple-A Louisville's win over Pawtucket. The No. 59 overall prospect connected on his second homer, a two-run shot in the first inning, and later added a double. On Wednesday he'll square off against 2012 AL Cy Young winner David Price, who's set to make his second rehab start for Pawtucket.
Pitcher to watch: Tony Santillan (Reds' No. 14), Dayton at Great Lakes (7:05 p.m. ET on MiLB.TV)
Santillan has been rolling of late for Class A Dayton, posting a 0.96 ERA with 22 strikeouts and zero walks across his last three starts totaling 18 2/3 innings. The 20-year-old righty has lowered his season ERA from 4.00 to 2.76 during that stretch, and he's now fanned 47 batters in 45 2/3 innings for the Dragons.
Weaver, MLBPipeline.com's No. 60 overall prospect, was roughed up for the first time this season in his last start for Triple-A Memphis, allowing four earned runs on eight hits in five innings. The 23-year-old righty was stellar before that, however, going 3-0 with a 0.45 ERA and 18 strikeouts in 20 innings (three starts) after coming off the disabled list.
Gregorio, 25, has been effective this season despite issuing 29 walks in 43 2/3 innings (6.1 BB/9) across eight starts for Sacramento. The 6-foot-7 right-hander owns a 2.47 ERA in that span, thanks largely to a .199 opponents' batting average and 36 strikeouts.
More top prospect probables
Josh Staumont (Royals' No. 2) vs. Paul Blackburn (A's No. 22), Omaha at Nashville (Triple-A) Chris Lee (Orioles' No. 6), Norfolk at Toledo (Triple-A) Rob Whalen (Mariners' No. 12), Tacoma vs. Fresno (Triple-A)
Patrick Weigel (Braves' No. 15), Gwinnett vs. Buffalo (Triple-A)
Trevor Oaks (Dodgers' No. 17), Oklahoma City at Albuquerque (Triple-A) Shawn Morimando (Indians' No. 17), Columbus vs. Scranton/Wilkes-Barre (Triple-A) Mark Appel (Phillies' No. 19), Lehigh Valley vs. Indianapolis (Triple-A) Ryan Yarbrough (Rays' No. 23), Durham at Rochester (Triple-A)
Tyler Alexander (Tigers' No. 4), Erie vs. Harrisburg (Double-A) Fernando Romero (Twins' No. 4) vs. Hunter Wood (Rays' No. 26), Chattanooga vs. Montgomery (Double-A)
Conner Greene (Blue Jays' No. 6) vs. Jalen Beeks (Red Sox's No. 28), New Hampshire at Portland (Double-A)
Brad Keller (D-backs' No. 7), Jackson at Jacksonville (Double-A) Connor Sadzeck (Rangers' No. 10), Frisco at NW Arkansas (Double-A)
Sam Coonrod (Giants' No. 11) vs. P.J. Conlon (Mets' No. 22), Richmond vs. Binghamton (Double-A)
Domingo Acevedo (Yankees' No. 13), Trenton vs. Reading (Double-A)
Austin Gomber (Cardinals' No. 14), Springfield at Corpus Christi (Double-A)
Julian Merryweather (Indians' No. 25), Akron at Altoona (Double-A)
Cody Sedlock (Orioles' No. 2), Frederick at Potomac (Class A Advanced)
Beau Burrows (Tigers' No. 3), Lakeland vs. Palm Beach (Class A Advanced)
Eric Lauer (Padres' No. 8), Lake Elsinore vs. Inland Empire (Class A Advanced)
Cody Ponce (Brewers' No. 15), Carolina at Down East (Class A Advanced)
Foster Griffin (Royals' No. 21), Wilmington vs. Lynchburg (Class A Advanced) Chris Flexen (Mets' No. 24), St. Lucie at Bradenton (Class A Advanced)
Genesis Cabrera (Rays' No. 28), Charlotte vs. Daytona (Class A Advanced)
Jon Duplantier (D-backs' No. 8), Kane County at Burlington (Class A)
Justin Maese (Blue Jays' No. 10) vs. Juan Hillman (Indians' No. 12), Lansing vs. Lake County (Class A)
Jose Paulino (Cubs' No. 14), South Bend at Bowling Green (Class A)
Bernardo Flores (White Sox No. 18), Kannapolis vs. Greenville (Class A)
Michael Matuella (Rangers' No. 20), Hickory at Lexington (Class A) Trey Supak (Brewers' No. 29), Wisconsin at Beloit (Class A)
Jordan Humphreys (Mets' No. 29), Columbia vs. Charleston (Class A)
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.