TUCSON, Ariz. — Ten Arizona Diamondbacks players and one coach missed spring training drills Sunday with unspecified "gastrointestinal conditions," according to manager Bob Melvin.

The team isn't sure if the illness stems from something the players ate, a virus going around the clubhouse or some other factor.

"I'm not an authority on gastrointestinal conditions," Melvin said, but after talking with the team physician he expects all to return to practice Monday.

Some players fell sick Saturday night, others arrived at the clubhouse Sunday morning feeling sick and were sent home.

The 10 players who missed Sunday's workouts included Justin Upton, Chris Young, Daniel Schlereth, Miguel Montero, Scott Schoenweis, Doug Slaten, Brooks Brown, Jon Coutlangus, Clay Zavada and John Hester.

Bullpen coach Glenn Sherlock was also sick.