During the NFL Scouting Combine, the 6-foot-3 and 321-pound Greene recorded a 40-time of 5.2 seconds and a broad jump of 98 inches. He started 25 straight games at right guard for the Aztecs heading into the 2015 season, but was suspended for six games in 2015 after testing positive for marijuana. He returned and started for San Diego State's final seven games.
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During his pro day, he had a vertical jump of 22.5 inches and a broad jump of 99 inches.
Lance Zierlein of NFL Media, who compared Greene to Shaq Mason, had the following to say in his scouting report:
Stocky, prototypical right guard with the power to unclog running lanes and help a rushing attack looking to dominate with the physical over the finesse. Greene lacks the length NFL teams usually look for but his tremendous power could be an offset. His NCAA suspension for drugs will be heavily vetted before teams decide to pull the trigger on Greene, but the power and NFL ability is there.