The Seattle Mariners picked up an extra base runner that turned about to be very important thanks to a rare challenge in Thursday’s win in Kansas City .

Mariners return to first place in AL West, close in on first-round bye

After Mariners right fielder Dominic Canzone grounded out to Royals second baseman Michael Massey for the second out in the top of the eighth inning, Seattle manager Dan Wilson emerged from the dugout and asked to have Massey’s defensive positioning reviewed.

Per MLB’s defensive shift rules , infielders cannot be on the outfield grass when the pitcher is on the rubber. And as it turned out, the very back of Massey’s cleats were indeed on the grass before the pitch to Canzone.

After the play was reviewed at MLB’s replay command center in New York, Canzone was awa

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