Coleman and Sterling Shepard were both injured Thursday during the team’s first training camp practice.
Shepard, who is expected to play a bigger role after the trade of Odell Beckham Jr., fractured his thumb and will be evaluated on a week-to-week basis. There is optimism he could be ready for the season opener in just over six weeks.
The injuries leave the Giants especially thin at wide receiver. Coleman was supposed to compete for a big role, potentially as the team’s third receiver.
Slayton, a fifth-round pick this year, is dealing with a hamstring injury.