The Seattle Seahawks begin training camp on Wednesday, July 23 , officially kicking off the second season under head coach Mike Macdonald. Seattle’s rookie class — draft pick and undrafted free agent alike — will be among the most closely watched additions to the team during camp. This season, the Seahawks have 29 total rookies on their 90-man roster . Before camp begins, we will profile each of the team’s first-year players and project their chances of making the final 53-man roster in late August. Following a solid five-year career at Iowa State, UDFA defensive lineman J.R. Singleton will try and outplay multiple veterans for a roster spot. Path to the NFL Singleton was a three-star recruit