During the recent Dallas Cowboys rookie minicamp, first-round pick Caleb Downs was sporting a new number. After wearing No. 2 throughout his collegiate career, Downs was given the number 18. With rookie minicamp done, the Cowboys are now preparing to meet for voluntary OTAs, which begin in less than a month on June 1 . When the Cowboys arrive for those workouts, it appears as though Downs will again have a new number. Tommy Yarrish of the team’s official website says that per the Cowboys Pro Shop, Downs will wear No. 13 . For those who want to sport his jersey, however, he reminds us that this number is subject to change before the regular season. “While Downs' number is set to be #13 for the time being, it is subject to change and still could be different between now and the beginning of the regular season,” Yarrish wrote. George Pickens began his Cowboys career in No. 13 last season Dallas Cowboys wide receiver George Pickens reacts after scoring a touchdown against the Las Vegas Raiders.…