Kupp caught one of two targets for 13 yards in Sunday's 30-23 win over the Chargers.
Arroyo didn't record any catches during Seattle's win over the Chargers on Sunday.
Holani rushed seven times for 18 yards in Sunday's 30-23 win over the Chargers. He added one catch for two yards on one target.
McGowan turned six carries into 31 yards and caught one of two targets for seven yards during Sunday's 30-13 win over the Commanders in London. He also returned four kickoffs for 102 yards.
Treadwell caught five of six targets for 42 yards in Sunday's 30-13 win over the Commanders.
Horton brought in his lone target for a six-yard touchdown during Sunday's 30-23 win over the Chargers.
Henry was signed to the Seahawks' active roster Monday, NFL reporter Jordan Schultz reports.
Barner caught one of three targets for 12 yards during Sunday's 30-23 win over the Chargers.
Key (hamstring) has been ruled out for the Colts' matchup with Pittsburgh in Week 5, James Boyd of The Athletic reports.
Head coach Mike Macdonald said Monday that he expects Williams (ankle) to be available for this Sunday's NFC West showdown against the 49ers, Tim Booth of The Seattle Times reports.
