McShay's 2018 NFL draft rankings: Top 10 prospects at every position

Top QBs ready to battle for college football supremacy (1:13)

Lamar Jackson, Sam Darnold and Jalen Hurts headline the top QB Heisman hopefuls. (1:13)

The college football season is inching closer, which means the 2018 NFL draft will be here before you know it. The crew from Scouts Inc. and I spent the summer scouring tape and ranking the top draft prospects at each position.

I started last week with the defense, and so now it's time for the offense. And remember: These are preliminary rankings -- there's no telling who will emerge this season.

Click the links below to read our rankings of the positions we've evaluated so far:

DT | DE | OLB | ILB | CB | S | QB | RB | WR | TE | OL

Note: Underclassmen are marked with an asterisk.

Offensive linemen

1. Connor Williams, OT, Texas*

Grade: 90

A true junior who has started all 23 games in which he has appeared the past two seasons, Williams is a scheme versatile blocker. He anchors well, gets good initial hand placement and locks defenders out once he's latched on. He's our top offensive tackle prospect heading into the season.