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," manager Bob 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 were 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.

Notes

The Diamondbacks can't wait to see if Felipe Lopez, who signed a one-year, $3.5 million contract in December will provide consistency at the top of the lineup. "We're excited," Diamondbacks General Manager Josh Byrnes said. "He's a switch-hitter with some power and speed. I think it's a good complement to our lineup. When he's been good in his career, he's been real good." Lopez, who will be given every opportunity to become the team's everyday leadoff hitter, hit 23 home runs in 2005 for the Reds and stole 44 bases in 2006, when he played for the Reds and Nationals. He also hit just .234 in 100 games with the Nationals before being released in July.

Arizona Diamondbacks News News » 10 Diamondbacks players sidelined with illness
10 Diamondbacks players sidelined with illness
TUCSON, Ariz. (AP) - Ten Arizona Diamondbacks players and one coach missed spring training drills Sunday with unspecified stomach illnesses. MLB Spring Training