Cain reaches into bullpen to rob Alvarez of homer

Summon the cops to Camden Yards because Lorenzo Cain just robbed Pedro Alvarez with the possible catch of the year.

The Kansas City Royals center fielder made sure Alvarez would not round the bases with a spectacular running over-the-fence grab while smashing into the outfield wall to pull back a home run.

Cain's entire arm ended up on the other side of the fence while making the play. An appreciative Yordano Ventura gave his outfielder a tip of the cap - while all Alvarez could do was look to the skies in wonder.

(Video courtesy: MLB.com)