The Detroit Pistons signed veteran guard Jaylen Nowell to a 10-day contract, the team announced on Wednesday.Nowell was averaging 17.4 points, 3.6 rebounds, 3.6 assists and 27.9 minutes in 28 games for the Stockton Kings of the NBA’s G League.He was signed earlier this season to a pair of 10-day contracts with the Memphis Grizzlies and averaged 5.7 points, 1.6 rebounds, 1.8 assists and 17.3 minutes in nine games (one start).