In case you're confused about what Bryce Harper is doing in the video, a recent Yahoo Sports article pointed out that rubbing bats on a cow bone is an old-fashioned tradition in baseball. It was thought to harden the sweet spot of the bat and make the bat last longer.
The bone-rubbing may or may not have any real physical benefit. But it might have a psychological benefit. After all, baseball players can be very superstitious. If they think something will help, then it just might.
The Diamondbacks have permanently installed a bone on a railing next to the dugout on their field. The bone was brought to Arizona by current hitting coach Don Baylor. As some of you may remember, Baylor is most famous for being a fill-in analyst for Nats post-game shows on MASN a couple years ago. Oh yeah, he apparently used to play baseball too. Got hit by pitches a lot.
Anyway, since the Diamondbacks are doing well this year, more teams might bring back the cow bone tradition. Will the Nats be one of them? I'm surprised that Baylor didn't revive the cow bone tradition in DC when he was here.