Tellez homered for the second time in three games on Sunday, giving him 19 home runs in 116 games. The 21-year-old first baseman has impressed in his first taste of the Double-A level by hitting .298 with 48 extra-base hits and 73 RBIs.
Castillo was sharp in his debut for Double-A Jacksonville on Aug. 23, when he allowed two runs (one earned) on five hits with four strikeouts over six innings against Chattanooga. A 23-year-old right-hander who can hit triple digits with his fastball, Castillo has jumped on the prospect radar this year in his first campaign as a full-time starter. Before advancing to the Southern League, he had posted a 2.07 ERA and 0.96 WHIP with a 91-18 strikeout-to-walk ratio over 117 2/3 innings (23 appearances/21 starts) for Class A Advanced Jupiter.
Smith, 25, turned in arguably the best performance of his season in his last start as he fired seven innings of one-hit ball with four strikeouts and no walks in a win over Triple-A El Paso. It also marked his second straight quality start for the left-hander.
Marquez is set to make his fourth start since moving up to Albuquerque from Double-A Hartford, where, at the time of his promotion, he was pacing all qualified hurlers in the Eastern League with a 2.85 ERA and 126 strikeouts. With the Isotopes, the 21-year-old right-hander has pitched to a 4.50 ERA, compiling 19 strikeouts and six walks in 18 innings.
Monday's top prospect probables Shawn Morimando (Indians' No. 13), Columbus at Durham (Triple-A) Nick Pivetta (Phillies' No. 18), Lehigh Valley at Buffalo (Triple-A) Matt Koch (D-backs' No. 20) vs. Chris Stratton (Giants' No. 26), Reno at Sacramento (Triple-A)
Brady Rodgers (Astros' No. 23), Fresno at Tacoma (Triple-A)
Taylor Clarke (D-backs' No. 6), Mobile vs. Montgomery (Double-A)
Spencer Adams (White Sox No. 3), Birmingham at Tennessee (Double-A)
Ariel Jurado (Rangers' No. 8), Frisco at Midland (Double-A) Nick Kingham (Pirates' No. 11), Altoona vs. Binghamton (Double-A)
Chance Adams (Yankees' No. 14), Trenton at New Hampshire (Double-A) Jason Garcia (Orioles' No. 16), Bowie vs. Harrisburg (Double-A)
Ricardo Pinto (Phillies' No. 16), Reading vs. Portland (Double-A)
Chase De Jong (Dodgers' No. 17), Tulsa at Springfield (Double-A) Rob Kaminsky (Indians' No. 19), Akron at Erie (Double-A)
Andrew Moore (Mariners' No. 10) vs. Brandon Woodruff (Brewers' No. 25), Jackson at Biloxi (Double-A) Jeff Brigham (Marlins' No. 20), Jupiter at Bradenton (Class A Advanced)
Sandy Baez (Tigers' No. 16), West Michigan at Fort Wayne (Class A)
Miguel Diaz (Brewers' No. 20), Wisconsin at Quad Cities (Class A) Nick Wells (Mariners' No. 25), Clinton vs. Cedar Rapids (Class A)
Dakota Chalmers (A's No. 9), Vermont vs. Tri-City (Class A Short Season)
Aaron Civale (Indians' No. 18), Mahoning Valley at Williamsport (Class A Short Season)
Ian Kahaloa (Reds' No. 23), Billings at Great Falls (Rookie) Guadalupe Chavez (Astros' No. 24), Greeneville vs. Elizabethton (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.