PRO FOOTBALL / DAILY REPORT : AFC : Ross Undergoes Intestinal Surgery

San Diego Charger Coach Bobby Ross underwent surgery for 1 1/2 hours Thursday night to relieve pressure from 40-year-old scar tissue that was pinching down on his intestines and causing pain.

Team trainer Keoki Kamau said the surgery at Scripps Memorial Hospital went as expected and estimated that Ross would remain in the hospital at least two more days. He might not return to coaching until Wednesday, four days before the season opener at Oakland.

The ailment comes at a critical time for the Chargers. Last Saturday’s game at Houston was canceled because of poor turf conditions at the Astrodome, preventing the coaches from evaluating players. The final roster cutdown comes Sunday.

Ross, 58, abruptly left a videotape session with some of his assistants Wednesday night and was driven to Scripps Memorial Hospital in La Jolla by Kamau, who described the symptoms as being “like an upset stomach. He had some soreness all over.”

Offensive coordinator Ralph Friedgen ran practice Thursday and will coach the team tonight against the St. Louis Rams.

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Starting quarterback Craig Erickson and backups Jim Harbaugh and Paul Justin each threw a touchdown pass as the Colts (3-1) finished the preseason with a 29-7 victory over the Chicago Bears (1-3) at Indianapolis.

Erik Kramer, who earlier this week regained the starting quarterback job he lost last year to Steve Walsh, guided the Bears to their only touchdown late in the first quarter. *

Renovating the Oakland Coliseum for the Raiders’ return will cost $100 million, about $15 million more than the publicly disclosed figure, the San Francisco Chronicle reported.

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A federal judge dissolved the Houston Oilers’ temporary restraining order, clearing the way for Houston and Harris County to sue the NFL team if it tries to move to Nashville, Tenn.

But U.S. District Judge Lynn Hughes warned lawyers for the city, county and operator of the Astrodome that to move in that direction, they would have to face him first, instructing them not to try to file lawsuits in state district courts.