The following chart comprises the weigh-in numbers for the linebackers at the 2018 NFL Draft Scouting Combine in Indianapolis.
40 Times: For the 40 times, I use both the official times and the NFL Network's unofficial times. I do this because the latter figures are more accurate. NFL teams use their own timed 40s anyway, so the official 40s are mostly meaningless.
Nine quarterbacks were drafted in the past 15 years with a Wonderlic of 15 or less, according to Bob McGinn. Those names were, alphabetically:
Of those nine, only Young and Taylor were starters for an extended period of time, and neither was particularly good. Young had a decent stretch for a couple of seasons, but flamed out because he never developed as a passer, failing to ever throw for more than 12 touchdowns in a single year. Taylor is currently a starter, but not for long. Jackson's Wonderlic of 13 doesn't mean he'll necessarily fail - with some great coaching, I think he could become a good starter - but history is going against him.