Aww, that's so sad!
Chase was a bat-retrieving golden retriever for the Trenton Thunder, the New Jersey based Double-A minor league team for the New York Yankees. He just passed away at the ripe, old age of 13.
The cute doggy would run out to the batter's box and pick up bats with his mouth and bring them back to the dugout.
He'd even carry a basket full of chilled water bottles to the umpires!
Sadly, Chase was diagnosed with a form of lymphoma earlier this year.