Arnold (groin) was listed as a full participant on Monday's practice estimation, Tim Twentyman of the Lions' official site reports.
Arnold (groin) is listed as questionable ahead of Sunday's matchup against the Colts.
Arnold (groin) was listed as a limited practice participant on Thursday's injury report.
Arnold (knee) has returned to Sunday's game against the Cardinals, Nolan Bianchi of The Detroit News reports.
Arnold exited Sunday's game against the Cardinals with a knee injury and is questionable to return, Tyler Drake of ArizonaSports.com reports.
Arnold (illness) is active for Sunday's game against the Cardinals.
Arnold (illness) is questionable for Sunday's Week 3 game against Arizona.
Arnold (illness) did not practice Wednesday.
Arnold (finger) is questionable to return to Sunday's game against the Buccaneers, Dave Birkett of the Detroit Free Press reports.
Arnold (pectoral) was spotted practicing Sunday, Nolan Bianchi of The Detroit News reports.