Guardians prospect Parker Messick shined in his MLB debut on the mound, but the Cleveland bullpen let him down in an extra-inning loss.

Parker Messick can finally say that he’s a big-league pitcher! The 24-year-old made his Cleveland Guardians and MLB debut on Wednesday afternoon against the Arizona Diamondbacks.

Cleveland Guardians newly promoted left-handed starter, Parker Messick had an outstanding debut against the Arizona Diamondbacks.

Lourdes Gurriel Jr. led off the ninth inning with a tying homer, Adrian Del Castillo had a broken-bat RBI single in the 10th and the Arizona Diamondbacks beat the Cleveland Guardians 3-2 on Wednesday.

Now, Cleveland’s No. 12 prospect ( according to MLB Pipeline) is set to make his MLB debut today in the series finale vs. the Arizona Diamondbacks at Chase Field. Messick joins the starting rotation in place of Joey Cantillo, who was optioned to Triple-A Columbus on Sunday.

The Guardians had options, but Stephen Vogt revealed that the team is going with their 12th-ranked prospect, Parker Messick, to start Wednesday’s game. There’s a lot to like about what the 24-year-old can offer to Cleveland’s pitching staff.

CLEVELAND, Ohio (WOIO) - Guardians rookie Parker Messick went 6.2 innings in his MLB debut Wednesday, allowing just 1 run to the Arizona Diamondbacks in Phoenix. Arizona won the series finale 3-2 in 10 innings. Cleveland pitcher Parker Messick gets a standing ovation in Arizona after a dominant outing in his first game 👀 pic.twitter.com/YtlO2JNacu

The Guardians have lost four of five and remain three games out of the third and final American League wild-card position.

The Guardians provided a progress report on many prospects, including Travis Bazzana and Chase DeLauter, who has resumed baseball activity amid rehab.

The Cleveland Guardians have a handful of decisions to make following this season, and it may mean getting rid of key pieces.

CLEVELAND, Ohio (WOIO) - Leigh Steinberg, an NFL agent for more than 40 years, told 19 News it’s “absolutely” possible that Guardians pitchers Emmanuel Clase and Luis Ortiz, on leave for potential gambling, will never pitch again in the majors.