Fernando Tatis Jr. wears a Lizard Skins arm sleeve with his logo on it. In the pictures from Spring, he hadn’t gotten the logo yet, but BaseballExpress.com has spotty inventory of the Lizard Skins sleeves at $11-$15 and you can also find it at other retailers with a Google search.
What Pros Wear: Fernando Tatis Jr.'s 100% S2 Sunglasses - What
What Pros Wear: The Source for Pro Baseball Gloves, Cleats, Bats
What Pros Wear: Rafael Devers' Chandler CB195 Maple Bat - What
What Pros Wear: Fernando Tatis Jr.'s Evoshield PRO-SRZ Leg Guard
What Pros Wear: Mike Trout Lizard Skins Bat Grip - What Pros Wear
What Pros Wear: Fernando Tatís Jr.'s Mizuno Pro GMP2BK-600R Glove
What Pros Wear: The Source for Pro Baseball Gloves, Cleats, Bats
What Pros Wear: The Source for Pro Baseball Gloves, Cleats, Bats
What Pros Wear: Carlos Correa's Adidas Core Arm Sleeve - What Pros