'WBC Injury Setback' Korean-American O'Brien, This Is Incredible! 12G 'ERA 0' Overwhelming Dominance → Already 3 Wins, Unbeaten, 6 Saves

*This content was translated by AI.

Expected to be the 'secret weapon' for the South Korean national team at the 2026 World Baseball Classic (WBC) held in March, right-handed relief pitcher Riley O'Brien (31, St. Louis Cardinals), who unfortunately missed the roster due to injury, is now absolutely bombing the Major League Baseball (MLB) mound.

On the 20th (Korean time), O'Brien made his fourth appearance of the game as the Houston Astros led 4-2 in the bottom of the 8th inning with two outs and runners on second and third base at Daikin Park in Houston, Texas. He pitched 1⅓ innings, allowing one hit and striking out two batters without surrendering a run, earning the win.

O'Brien took the mound in a crisis situation where the game was tied. He allowed a ground ball single by leadoff batter Isaac Paredes, tying the score at 4-4. Since the runner was not his responsibility, he was not charged with an earned run. Later, with two outs and a runner on first, he picked off lead runner Bryce Matthews at first base, extinguishing the immediate threat.

O'Brien returned to the mound in the bottom of the 9th inning with the score tied 4-4. He struck out both Cam Smith and Yainer Diaz, then induced a fly ball to center field from Dustin Harris for a three-up, three-down inning. In the top of the 10th, with one out and bases loaded, Mason Winn hit a two-run double, driving in three runs to put St. Louis ahead 7-4. Consequently, O'Brien met the winning pitcher criteria. In the bottom of the 10th, the St. Louis bullpen allowed only one run, securing a 7-5 victory.

Including the game on the 20th, O'Brien's performance this season is astonishing. Over his previous 12 games, spanning 12⅓ innings, his ERA is 0. He has recorded 3 wins, no losses, 1 hold, and 6 saves.

His detailed statistics are even more overwhelming. His walks plus hits per inning pitched (WHIP), a key indicator of pitcher stability, is an incredibly low 0.41. He has struck out a remarkable 14 batters. Notably, he has allowed zero walks, showcasing perfect control and throwing pitches that batters cannot hit even when they know they are coming.

The secret to O'Brien's dominant performance is his significantly increased velocity. According to Statcast data from Baseball Savant, the official MLB statistics tracking site, the average velocity of his signature sinker this season is 97.9 mph (approximately 157.6 km/h). This is 3.6 mph (approximately 5.8 km/h) faster than the MLB average sinker velocity of 94.3 mph. Additionally, he has incorporated the trending sweeper, mixing in changeups and sliders to induce swings and misses. O'Brien's current batting average against is a mere 0.125. It appears batters are struggling even to make solid contact with his pitches.

O'Brien is a mixed-race player with a Korean mother. Ahead of the WBC in March, he expressed his intention to play for his homeland, generating significant buzz. However, just before the tournament, he suffered an unexpected calf injury and was forced to withdraw from the final roster. Given O'Brien's overwhelming performance in the MLB this season, this is a regrettable situation for the South Korean national team. The prevailing view is that if O'Brien had joined the team, managing the bullpen would have been much easier.

Having overcome the disappointment of his injury, O'Brien has risen as the best closer in the Big Leagues. It is highly anticipated to see how far his scoreless streak will continue.

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*This content was translated by AI.