In four years with the Huskies, Pettis registered 163 receptions for 2,256 yards and 24 touchdowns. Since his junior year in 2016, he caught 116 passes for 1,583 yards with 22 touchdowns.
As a returner on special teams, Pettis has returned nine punts for touchdowns over his collegiate career while averaging 14.2 yards per return. Four of the nine touchdowns came during his senior year. He has 1,274 return yards in 90 attempts during his time at Washington.
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NFL.com projects Pettis to be a second- or third-round draft pick. He did not participate in the NFL Scouting Combine due to an ankle injury.
"I could [do the workout today]," Pettis said at the combine, "but I know that I could get a better time by doing all of those drills later."
The injury ended up preventing Pettis from working out for attendees at Washington's pro day as well.
Lance Zierlein of NFL.com, who compares Pettis to T.J. Houshmandzadeh, wrote the following within his scouting report:
"Solid secondary receiving option who has spent time on his craft and has the ability to attack and uncover on all three levels. Pettis lacks physicality and could struggle to handle in-your-face press corners, so he may see snaps from the slot. While his punt return talent solidifies his draft standing, his ability as route-runner combined with his smooth pass-catching should give him a long, solid career."
Measurables
Height: 6-0
Weight: 186 lbs.
Arm length: 32 1/4 inches
Hand length: 9 1/2 inches
College Statistics
| Year | G | Rec | Yds | YPC | TD |
| 2014 | 13 | 17 | 259 | 15.2 | 1 |
| 2015 | 13 | 30 | 414 | 13.8 | 1 |
| 2016 | 14 | 53 | 822 | 15.5 | 15 |
| 2017 | 13 | 63 | 761 | 12.1 | 7 |
| Totals | 53 | 163 | 2,256 | 13.8 | 24 |