Mariners’ Rookie Ace Bryan Woo Becomes MLB’s Hottest Story of 2025 – Stats, Highlights & What’s Next

SEATTLE—Seattle Mariners right-hander Bryan Woo continues to rewrite the record book in his first full Major League season. On Saturday in New York the 25-year-old became the first pitcher in MLB history to work at least six innings in each of his first 24 career starts, a streak that dates back to his 2023 debut and now covers the entire 2025 campaign. Woo scattered two runs over seven frames against the Mets, dropping his season ERA to 2.83 while pushing his strikeout total to 174 in 158 innings. Equally eye-opening is his command; he has issued only 24 walks all year, giving him the lowest walk rate (4.6 %) among qualified American League starters. That combination of length and efficiency has vaulted the Cal Poly product into early Cy Young conversations and helped Seattle stay within striking distance in the AL West. A fastball-first formula Standing 6-foot-4, Woo attacks hitters with a four-seam fastball that averages 96 mph and rides at the top of the zone nearly 70 % of the time. The pitch’s late life sets up a cutter and newly refined splitter that has generated a .178 opponent average since the All-Star break. “He’s showing that you don’t need five pitches if one of them is elite,” skipper Dan Wilson said postgame. Historical comps Only four pitchers in modern history—Vida Blue (1971), Tom Seaver (1969), Clayton Kershaw (2014) and Jacob deGrom (2018)—have finished a season with at least 150 IP, an ERA under 3.00 and a BB/9 below 1.5. Woo is on pace to join that quartet, but none of those legends began their careers with a six-inning streak of this length. A bullpen lifesaver Seattle relievers have thrown the third-fewest innings in baseball, a direct benefit of Woo’s durability. Closer Andrés Muñoz called him “our invisible off-day,” noting that every Woo start effectively gives the bullpen 24 hours of rest. Contract and club control Woo signed a one-year pre-arbitration deal in March but remains under team control through 2030, giving the Mariners a cost-controlled ace at a time when frontline pitching routinely commands nine-figure contracts. What’s next Woo lines up to face the division-leading Astros on Friday night at T-Mobile Park. Another quality start would move him past Félix Hernández (2010) for the longest six-plus-inning run in franchise history and further cement his status as 2025’s breakout star. With every outing, Bryan Woo is proving that reliability can still be headline news—especially when it borders on historic.