PHOENIX — Blaze Alexander laid out in left-center to somehow snag what seemed a certain gapper for Rowdy Tellez and snagged the ball for the final out of the sixth inning on Monday night. The Chase Field crowd erupted as did the Arizona dugout.

Then everyone suddenly realized something was wrong. Really wrong.

Left fielder Lourdes Gurriel Jr., who had been running for the ball as well, was laying crumpled on the turf holding his right leg in obvious pain.

Judging by the television replays, Gurriel injured his right knee while trying to avoid the diving Alexander.

Alexander waved out the trainers and Gurriel eventually got to his feet and was helped to a medical cart and taken off the field.

Any injury to Gurriel would be another big blow to the Diamondbacks, who find themselves barely hanging on to slim postseason hopes. Gurriel came into the game riding a hot streak at the plate with 32 RBIs since Aug. 1, second to only Kyle Schwarber’s 33 over that span.