Lol you didn't 'cut your losses' with Harper, you tried to sneak him on the PS squad because you were stupidly blinded by the preseason success of your other two nobody receivers (can't wait to revisit this in December when they've completely busted), and you got burned. Then, after said burning by a far superior FO, you desperately tried to convince Harper to still stay like that lame loser friend everyone knew growing up who'd let you borrow anything just to be his friend.
Usually easy to convince people to stay with all those PEDs Cheatin Pete offers. Harper sounds like a smart young man to resist that temptation.