Today's starting pitching matchup features Seattle Mariners's Luis Castillo (0-1, 5.01 ERA) against Minnesota Twins's Connor Prielipp (0-0, 4.50 ERA).

Both starters carry similar ERAs, setting the stage for a potential pitchers' duel. WHIP: Luis Castillo 1.71, Connor Prielipp 1.00.

Advanced metrics: Luis Castillo — FIP 3.53, K% 21.1%, 23.3 IP / Connor Prielipp — FIP 0.10, K% 35.3%, 4.0 IP

2026 season record: Seattle Mariners 14-15 (.483), Minnesota Twins 12-16 (.429).

Seattle Mariners holds the edge in the season standings, though Minnesota Twins can't be counted out based on head-to-head matchups.

Recent form: Seattle Mariners on a 4-game win streak, Minnesota Twins on a 5-game losing streak.

Based on starting pitching, Minnesota Twins holds the edge.

Seattle Mariners bullpen: 13 relievers on the active roster. Key arms: Andrés Muñoz (Closer) 6.55 ERA, 18 K in 11.0 IP, Bryan Woo 3.86 ERA, 27 K in 35.0 IP.

Minnesota Twins bullpen: 13 relievers on the active roster. Key arms: Andrew Morris 7.71 ERA, 8 K in 7.0 IP, Anthony Banda 8.74 ERA, 11 K in 11.1 IP, Bailey Ober 3.94 ERA, 27 K in 32.0 IP.

Projected win probability: Seattle Mariners 46% vs Minnesota Twins 54%

Factors: Minnesota Twins's starter owns the lower ERA, Minnesota Twins's home-field advantage. Of course, baseball's inherent randomness means actual results may differ.

Workload comparison: Luis Castillo averages 4.7 IP per start vs. Connor Prielipp at 4.0 IP. Getting six-plus innings from the starter significantly eases the bullpen burden.