When Buffalo Bills safety Damar Hamlin suffered cardiac arrest and collapsed on the field in the middle of the “Monday Night Football” game in Cincinnati on Jan. 2, Carrie Hastings, half a continent away, understood what she needed to do — and right away. “I had a few guys that I sort of immediately knew I should check in on,” said Hastings, the Los Angeles Rams’ sports psychologist and mental health clinician. “A couple of spouses and significant others, too.” Hastings’ familiarity with the Rams’ personnel, and with which players might be emotionally traumatized after watching Hamlin’s shocki…