He could be an absolute steal but its always better to avoid the true knuckleheads.
That said, a lot of what he has done seems like young and stupid offenses rather than being a malicious thug, Dallas may feel like they can keep him on the straight and narrow being around guys like Dak and Witten.
FWIW, Dane Brugler has him going in the 4th or 5th with this summary, check out the NFL Scout quote:
STRENGTHS: Above average play speed and everything he does is quick…forces cornerback to protect vs. deep routes because once he gains a step, he doesn’t give it back…lower body twitch to make sudden cuts at the top of patterns or as a ballcarrier…doesn’t slow his stride or gear down when changing directions…dangerous YAC skills to elude defenders on screens/slants…natural feel for space mid-route, establishing leverage…quickly resets his vision to find an escape path……proven versatility as the first player in school history to score a touchdown five different ways (rushing, receiving, passing, kick return, punt return)…averaged 12.1 yards on punt returns (54/653/2)…averaged 29.3 yards on kick returns (6/176/1)…NFL bloodlines – cousin (John Brown) is a wide receiver for the Arizona Cardinals and former third round pick in the 2014 NFL Draft.
WEAKNESSES: Undersized, slender frame…fights the football with concentration issues at the catch point…feels ghosts over the middle of the field and when returning punts…questionable football IQ and situational awareness…poor stem discipline, drifting at the top of routes…struggles to power through the jam or tackle attempts…ball security issues with six career fumbles, including five in 2016…missed playing time at Florida due to injuries to his foot (Oct. 2015) and right quad (Sept. 2016) – also suffered a torn meniscus (Oct. 2014) as a senior in high school…numerous off-field red flags in his background – suspended for the 2017 season after his involvement with a credit card fraud scheme (felony charges were dropped after a plea deal was reached); cited for marijuana possession (May 2017) while he was a passenger in the car of a 40-year old career criminal; was the target of a Title IX and sexual assault allegation (Dec. 2015) and was suspended for 2016 spring practices, but was found “not responsible” after he claimed to be “high” on marijuana…NFL scout: “He’ll fail at least one drug test in the NFL. Put that in your guide.”
SUMMARY: A two-year starter at Florida, Callaway was the featured weapon on the Gators’ offense during the 2015 and 2016 seasons, lining up across the formation and serving as the primary punt returner. He became the third-fastest player in school history to reach 1,000 career receiving yards, creating explosive plays with 21 of his 89 career catches resulting in 20+ yards. Quick as a hiccup, Callaway has the natural speed and ease of movement to be a home run threat any time he touches the ball. However, his film is riddled with mental mistakes and his poor off-field decision-making deserves scrutiny. Overall, Callaway is a sudden athlete with the playmaking skills to be a NFL starter, but his unreliable focus (both on and off the field) makes it tough to believe he will reach that sky-high potential.
Bad boy
