WATCH: Hunter Greene throws up on the mound during the top of the first inning in Reds vs. Pirates game

Cincinnati Reds hurler Hunter Greene threw up in the first inning of Tuesday's game against the Pittsburgh Pirates at the Great American Ball Park. He vomited while on the mound after pitching a 95 mph fastball to the Pirates' Bryan Reynolds.

The announcer said Greene was sick during his last start due to hot conditions and that after the game, the 24-year-old mentioned being overhydrated.

"Hunter Green got sick during the course of his last start when he battled the incredibly hot conditions. After the game, he said he thought he over-hydrated and I think he just had a similar scene of a bout with illness on the mound," the announcer said (via Talkin' Baseball's X handle).

Six pitches later, Reynolds shot a two-run homer against Greene for the first score on the board. Following that, the Pirates scored one more run in the first before a 3-run inning in the third. After throwing four innings, Hunter Greene was pulled out of the game.

As far as the game is concerned, the Reds are trailing 9-3 at the top of the sixth inning at the time of writing.

Hunter Greene threw up following his last start

MLB: Cincinnati Reds at Pittsburgh Pirates (Image credit: IMAGN)

Charlie Goldsmith of The Enquirer reported that even during his last start on June 19, Greene mentioned drinking too much water to battle heat, which resulted in him throwing up after the game.

Hunter Greene, who is known to pitch the hardest fastballs in the game, seems to be struggling to keep up with the heat. Although he is having a good season with the Reds, Tuesday's outing was his worst this season. The last time he surrendered more than four runs was on June 1, when he gave up five runs in six innings against the Chicago Cubs.

With that said, Hunter Greene may very well be having a career year. He has gone 5-2 and has pitched 88.2 innings for a 3.79 ERA and 98 strikeouts. Last season, he went 4-7 and pitched to a 4.82 ERA mark.

The California native went second overall during the 2017 MLB draft to the Reds.