Kansas City Royals vs Seattle Mariners Preview
Today's Starting Matchup
Today's starting pitching matchup features Kansas City Royals's Kris Bubic (2-1, 3.74 ERA) against Seattle Mariners's Luis Castillo (0-2, 6.35 ERA).
Kansas City Royals's Kris Bubic posts an league-average 3.74 ERA this season, while Luis Castillo has been struggling at 6.35. There is a clear gap in starting pitching quality.
Advanced metrics: Kris Bubic — FIP 3.78, K% 25.5%, 33.7 IP / Luis Castillo — FIP 4.48, K% 19.4%, 28.3 IP
Team Season Comparison
2026 season record: Kansas City Royals 14-19 (.424), Seattle Mariners 16-18 (.471).
Recent form: Kansas City Royals on a 2-game win streak, Seattle Mariners on a 2-game losing streak.
Based on starting pitching, Kansas City Royals holds the edge.
Bullpen Analysis
Kansas City Royals bullpen: 13 relievers on the active roster. Key arms: Alex Lange 6.59 ERA, 19 K in 13.2 IP, Cole Ragans 5.29 ERA, 41 K in 32.1 IP, Daniel Lynch IV 2.19 ERA, 15 K in 12.1 IP.
Seattle Mariners bullpen: 13 relievers on the active roster. Key arms: Andrés Muñoz (Closer) 5.54 ERA, 21 K in 13.0 IP, Bryan Woo 4.61 ERA, 29 K in 41.0 IP.