The 51s were where Montero started the 2016 campaign. On April 12, Eric Campbell was demoted to the 51s, and he was brought up in his place.
With an ERA of 8.02 in his one start, Montero allowed 23 hits, 17 runs (all earned), 4 walks, and 16 strikeouts in 19 innings pitched.
He finished 5-11 with a 5.52 ERA in 2017. After tearing his UCL, Montero underwent Tommy John Surgery and missed the whole 2018 season.
On November 3rd, 2018, he chose free agency. A minor-league contract with the Texas Rangers was inked by Montero on December 4th, 2018.
When Montero returned from Tommy John surgery on June 17, he appeared for the Arizona League Rangers, the Frisco RoughRiders, and the Nashville Sounds.
Montero was called up to the major leagues by the Rangers on July 22nd, 2019. This year, Montero pitched for the Texas Rangers, going 2–0 while sporting a 2.48 ERA and striking out 34 opposing batters in 29 innings pitched.
During the pandemic-shortened season of the next year, he recorded an 8-for-8 record in save chances, the first of his major league career, with a 4.08 ERA and 1.02 WHIP in 17+2/3 innings of work.
For Jose Corniell and an unspecified player, Montero was transferred to the Seattle Mariners on December 15, 2020. From Texas, the PTBNL Andres Mesa was dispatched on the 14th of June 2021.
When playing for the Mariners, Montero had a 7.27 ERA and 37 strikeouts in 40 appearances. The Mariners designated Montero for assignment on July 23, 2021.
In exchange for infielder Abraham Toro and pitcher Joe Smith, Montero was part of a transaction that sent him to the Houston Astros on July 27th, 2021.
How Many Blown Saves Does Rafael Montero Have?
With his games statistics, Rafael Montero has not made any Blown Saves yet.