Red flags come in all different shapes and sizes.
They can be physical skills. They can be on-field qualities. They can be off-field issues.
There are five quarterbacks — Josh Rosen, Sam Darnold, Josh Allen, Baker Mayfield and Lamar Jackson — commonly projected as first-round picks in the NFL Draft, and all will be on hand this week at the NFL Combine in Indianapolis.
All 336 prospects at the NFL Combine will be poked and prodded .