JD Thompson is yet another name in a deep and diverse array of college left-handed pitchers in the 2025 class. In terms of frame, it's more compact. Thompson stands at 6'0, 185 pounds with good strength and power in his lower half. While Thompson doesn't have a high-octane fastball, it's a whiff monster thanks to 18 inches of carry from a lower arm slot. The pitch typically sits in the 91-93 mph range, though he can crank it up to 95 mph. He commands the pitch, too, helping it be relatively dominant for the level.

His best secondary is his slider. It sits in the 78-81 mph range with good horizontal movement and ties up left-handed hitters frequently. There's also a curveball and changeup in the mix, too. The changeup, in particular, has flashed above average with some fade and tumble. All of this comes from a delivery that is relatively smooth and repeatable.

Thompson has consistently posted in 2025. Through 90 IP, he has a 3.34 FIP, striking out 32.1% of hitters and walking 7.9% against some of the strongest competition in the country. He's set himself up as a day one name in July.