Coach Joe Judge said Slayton (ankle/foot) will be evaluated by the Giants' medical staff Monday, Ralph Vacchiano of SportsNet New York reports.
Slayton limped to the sideline and had his left ankle taped during the first half of Sunday's preseason loss to the Patriots. Eventually, he was deemed questionable to return and then ruled out entirely, finishing the contest with one catch (on two targets) for six yards and a seven-yard carry. Judge relayed Slayton is "optimistic" about his injury, but Monday's checkup may provide more clarity about the wide receiver's health.