Mariners vs Athletics Prediction, Pick, MLB Odds for Saturday, September 12

The Seattle Mariners host the Oakland Athletics on September 12, 2026, with first pitch set for 9:40 p.m. EDT at Sutter Health Park. Seattle enters as the betting favorite, listed at -178 on the moneyline, while Oakland sits at +150. The Mariners are also favored by -1.5 runs (-115), with the Athletics at +1.5 (-104). The total is 9.5 runs, priced at -110 over and -110 under. The preview highlights Mariners starter Bryan Woo’s strong season indicators and contrasts home vs. road splits, while noting recent defensive and bullpen struggles for Seattle.