Snell, a Seattle native, struck out 12 through six innings before exiting with a 1-0 lead. He gave up no runs and two hits and didn't walk anyone. The Mariners wound up rallying for a 2-1 win off the Tampa Bay bullpen.
The major league record of eight at the outset of a contest was set by Houston's Jim Deshaies in 1986 and matched by Jacob deGrom of the New York Mets in 2014.
Eighth-place hitter Denard Span was the first Mariners player not to strike out. He grounded out to second to end a 10-pitch at-bat.
Snell followed by striking out Mike Zunino to make it eight of the first nine Mariners to be retired on strikes.
--Field Level Media