Cubs To Promote Riley Martin
April 5: Martin’s recall and Horton’s placement on the IL are now official. In addition, the Cubs have recalled right-hander Ethan Roberts to the majors as the club’s 27th man for today’s doubleheader against the Guardians.
April 4: The Cubs will promote left-hander Riley Martin from Triple-A Iowa to their active roster before today’s game with the Guardians, according to Bleacher Nation’s Jacob Zanolla. Martin is likely the corresponding move for Cade Horton‘s forthcoming placement on the 15-day injured list, and no other transaction is needed since Martin is already on Chicago’s 40-man roster.
The 28-year-old Martin will be making his Major League debut whenever he is first used in a game. The southpaw was a sixth-round pick for the Cubs in the 2021 draft, and he has pitched at the Triple-A level in each of the last four seasons. Working almost exclusively as a reliever, Martin has a 3.88 ERA and an impressive 30.67% strikeout rate over 139 1/3 innings in Iowa, but with an inflated 15.57% walk rate. Left-handed Triple-A batters contributed most of that damage, as Martin had significant reverse splits in both 2024 and 2025.
Baseball America ranked Martin 20th on its list of the top 30 Cubs prospects, while MLB Pipeline has the southpaw 28th on their top-30 ranking. He relies almost entirely on a plus curveball that, as per Pipeline’s scouting report, “can be devastating at times and also lose some shape and miss the zone by wide margins at others.” In general, Pipeline’s evaluation feels Martin “trades control for deception” in deploying an upright delivery to maximize the break on his pitches.
Chicago placed Martin on the 40-man roster last November in advance of the Rule 5 Draft, and the lefty will now take the next step into the big leagues for the first time. Martin has often worked multiple innings out of the pen, giving the Cubs some extra length as they figure out how to manage Horton’s absence. Swingman Colin Rea could be the top candidate for rotation work, Ben Brown is another candidate already on the active roster, or the Cubs might use both pitchers and other arms for a bullpen game or two until Rea is fully stretched out for a starting role.
Cubs Select James Triantos, Pedro Ramírez, Riley Martin
The Cubs announced that they have selected infielders James Triantos and Pedro Ramírez as well as left-hander Riley Martin. Those three are now protected from being selected in next month’s Rule 5 draft. The club’s 40-man roster count is now at 32.
Triantos, a second-rounder out of high school in 2021, has been one of the more promising pure hitters in the system for the past few seasons. His stock is down after a poor season with Triple-A Iowa. Triantos only managed a .259/.315/.370 slash over 480 trips to the plate. He continued to put the ball in play at a high rate but without much authoritative contact. He hit seven homers and posted well below-average exit velocities. Triantos stole 31 bases while bouncing between second base and the outfield, so perhaps he can factor in as a utility piece in 2026.
Ramírez, a 21-year-old infielder out of Venezuela, is now the superior prospect in the eyes of Baseball America. He’s the only member of this trio to crack Chicago’s top 10 prospects on their recent update of the system. He’s a switch-hitting second/third baseman who batted .280/.346/.386 while stealing 28 bags in 563 plate appearances at Double-A Tennessee this year. Ramírez is also light on power but has excellent contact skills. He’ll probably get the bump to Iowa to begin 2026.
Martin is an Illinois native who was a sixth-rounder in 2021 out of Division II Quincy University. The 6’1″ southpaw has spent the past two seasons pitching out of the bullpen in Triple-A. He fired 63 2/3 innings of 2.69 ERA ball with a near-31% strikeout rate over 47 appearances. Martin struggles with walks and dished out free passes at a 13.4% clip. He works with a 94 MPH fastball and uses a mid-80s curveball as his favored secondary pitch.