EAST LANSING (AP) — Michigan State coach Mark Dantonio is back in the hospital because of a blood clot in his leg and will miss the 24th-ranked Spartans' game against No. 11 Wisconsin on Saturday.

The school announced hours before kickoff that Dantonio was admitted to Sparrow Hospital on Thursday after a routine postoperative examination revealed the clot. Dantonio had a mild heart attack Sept. 19 that caused him to miss last weekend's game against Northern Colorado. He was planning to coach against Wisconsin from a box above the field.

"Coach Dantonio is doing well and his prognosis is excellent," Michigan State athletic director Mark Hollis said. "He was admitted to Sparrow Hospital for monitoring and treatment. The cardiologist told Coach D that it was in his best interest to sit out another game and to stay off his feet."

Dantonio's heart attack came shortly after he led his team to an overtime victory over Notre Dame the night of Sept. 18. He was released from the hospital a couple days later but skipped the Northern Colorado game while offensive coordinator Don Treadwell took over his coaching duties.

Dantonio showed up at his Tuesday news conference this week and said he was going to ease back into his job. He was at practice later that day, and the plan was for him to coach the team from a box against the Badgers.

The school said Saturday his release date from the hospital hasn't been determined.

"Blood clots are not uncommon following a number of surgical procedures and can occur after a cardiac catheterization procedure," cardiologist Chris D'Haem said. "The clot can block blood flow and cause swelling and pain."

D'Haem performed the initial procedure after Dantonio's heart attack, to put a stent in a blocked blood vessel leading to the heart.

Michigan State (4-0) opens Big Ten play against Wisconsin (4-0). The Spartans play at Michigan next week.

"Although Coach D will be unable to watch today's game from the press box, make no mistake that he remains in control of our football program. He was able to attend meetings and practices earlier this week, and since his hospitalization, he has been in regular contact with his coaching staff as well as the team captains and other team leaders," Hollis said.

"Coach D has the utmost confidence in his coordinators, Don Treadwell and (defensive coordinator) Pat Narduzzi, and his entire coaching staff. He expects it to be business as usual this afternoon against Wisconsin."