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Looking to bolster their struggling bullpen, the St. Louis River Walkers have removed left-hander Armando Cintron from the injured list and called up right-hander Elvis Pool from AAA Memphis.
Cintron, 34, has been with the Walkers since the start of the season but has been injured three separate times since July 9, twice spending time on the 10-day injured list.
The left-handers first two injuries were to the elbow on his throwing arm. The most recent, which occurred August 14, was to his back.
Cintron has pitched well when available this season, going 2-0 with five saves and a 2.36 ERA in 38 games.
St. Louis picked up Pool in a July 7 trade with Peoria.
The Walkers sent veteran center fielder Jose Segura and right-handed reliever Mike Fagan to Peoria in the deal.
Pool has been playing professional baseball since 2025, but only pitched seven games in the majors in four different seasons.
He last appearance in the majors was for Louisville in 2035.
Pool got into two games that season for the Sluggers and went 0-0 with a 27.00 ERA over two-thirds of an inning.
This season, Pool was suffered a torn meniscus during spring training and didn't make his first appearance until July 20 for Memphis against Iowa.
Pool pitched in nine games for the Redbirds, going 1-0 with three saves and a 0.69 ERA.
Getting sent down were 24-year-old right-hander Maximiliano Minelli and left-hander Mark Pendleton.
Minelli was sent to Memphis. Pendleton went to AA Springfield.
Minelli started the season in St. Louis before getting sent down. He returned to the Walkers' roster on July 7.
In 25 games with St. Louis this season, Minelli has gone 0-1 with one save and a 4.56 ERA in 25 games.
Pendleton has had two brief tenures with St. Louis this season having pitched in three games. He compiled no record or ERA.