Mavis Graves Stats & Scouting Report

IP	81.2
ERA	4.41
WHIP	1.530
BB/9	5.6
SO/9	11.4

Full name William Mavis Graves
Born 11/20/2003 in Greenville, SC
Profile Ht.: 6'6" / Wt.: 205 / Bats: L / Throws: L
School Eastside
Drafted in the 6th round (182nd overall) by the Philadelphia Phillies in 2022 (signed for $247,500).

View Draft Report

A projection lefthander with a quick arm, Graves is listed at 6-foot-4, 195 pounds and has plenty of room to add strength and muscle mass in the future. He has mostly pitched in the upper 80s and touched low 90s numbers at peak, but it’s easy to see him increasing that velocity as he adds physicality in the future. He also throws a curveball in the upper 70s that will flash solid depth and has shown some feel for a changeup in the 78-80 mph range. Graves is committed to Clemson.

Top Rankings

Organization Prospect Rankings

BA Grade/Risk: 40/High.

Track Record: When the Phillies drafted Graves in 2022, they were betting on his upside and projectable frame. They drafted him in the sixth round and paid $247,500 to buy him out of a commitment to Clemson. In his first run through a full-season league in 2024, Graves’ 117 strikeouts ranked fourth in the Florida State League and sixth in the system.

Scouting Report: So far, it appears the Phillies’ bet on Graves’ fastball taking a jump has been accurate. The pitch sat at 91 mph and touched as high as 95. He complements the heater with a deep mix that includes a two-seamer, a slurve, a cutter and a changeup. The changeup—thrown in the low 80s—is Graves’ best offspeed pitch. It features fade and drop at its best and produced a miss rate of 49.5% in 2024. His cutter wasn’t far behind, garnering a miss rate of 47.3%. Graves held lefties and righties to OPSes of less than .700. Scouts were concerned about how his delivery would impact his command and his chances to start. They would also like to see him do a better job holding runners and show a better ability to make adjustments during starts, though they were somewhat impressed with his feel to pitch.

The Future: Graves was shut down toward the end of the 2024 season when he reached his innings limit. He’ll head to High-A Jersey Shore in 2025 and has a chance to be a back-end starter or bulk reliever.

Scouting Grades: Fastball: 45 | Curveball: 45 | Changeup: 50 | Cutter: 50 | Control: 50.

Draft Prospects

School: Eastside HS, Taylors, S.C. Committed/Drafted: Clemson
Age At Draft: 18.7
A projection lefthander with a quick arm, Graves is listed at 6-foot-4, 195 pounds and has plenty of room to add strength and muscle mass in the future. He has mostly pitched in the upper 80s and touched low 90s numbers at peak, but it’s easy to see him increasing that velocity as he adds physicality in the future. He also throws a curveball in the upper 70s that will flash solid depth and has shown some feel for a changeup in the 78-80 mph range. Graves is committed to Clemson.

Career Transactions

Jersey Shore BlueClaws activated LHP Mavis Graves from the 7-day injured list.
Jersey Shore BlueClaws placed LHP Mavis Graves on the 7-day injured list retroactive to September 1, 2025.
Jersey Shore BlueClaws activated LHP Mavis Graves.
Jersey Shore BlueClaws transferred LHP Mavis Graves to the Development List.
LHP Mavis Graves assigned to Jersey Shore BlueClaws from Clearwater Threshers.
Clearwater Threshers activated LHP Mavis Graves.
Clearwater Threshers transferred LHP Mavis Graves to the Development List.
Clearwater Threshers activated LHP Mavis Graves.
Clearwater Threshers transferred LHP Mavis Graves to the Development List.
LHP Mavis Graves assigned to Clearwater Threshers.
FCL Phillies activated LHP Mavis Graves.