Josh Allen received zero offers out of high school and now looks to join Alex Smith as the only QB from the Mountain West to be selected in the first round. (0:52)

Practices are underway at the 2018 Senior Bowl in Mobile, Alabama, where quarterbacks Josh Allen and Baker Mayfield are the main attraction on rosters full of NFL draft talent. Allen and the rest of the top senior NFL draft prospects were poked, prodded, measured and weighed Tuesday morning, but Mayfield's arrival was delayed, and he got to Mobile in time for the North team practice in the afternoon.

Now that both teams have practiced, our team of NFL draft experts -- Todd McShay, Matt Bowen and Steve Muench -- are breaking down how the best prospects fared, which under-the-radar prospects are rising, and more. Here's their recap of Day 1.

Check out the full rosters here. Coverage of Wednesday's and Thursday's practices begin on ESPNU/WatchESPN at 1:30 p.m. ET.

How each quarterback fared on Day 1

Let's start with the two headliners, then hit the other six signal-callers in Mobile:

Josh Allen, Wyoming

Team: North | Uniform number: 17 | Overall QB ranking: 3