Ignoring the pounding rain on the fringes of tropical storm Bob, the Miami Dolphins drilled at their St. Thomas University training facility yesterday in Miami.

"The only thing that ever drives us in is lightning," Coach Don Shula said. "The cold, hard facts of life are that you might have to play on a day like this, and I don't know how to prepare for it unless you practice on a day like this."

But Shula, who took the team out in the afternoon despite thunder, conceded, "It was about as tough a weather condition as you can get."

Lions: Detroit signed second-round pick Kevin Glover, a center from Maryland. Contract terms with the 6-foot-2, 262-pound lineman were not announced.

49ers: Wide receiver Jerry Rice, San Francisco's top draft pick, signed a reported $1.8 million, five-year deal with a $500,000 bonus for signing. Rice, 6-2, 200 pounds, had 301 catches for 4,693 yards and 50 touchdowns for Mississippi Valley State.

The team also announced it agreed to terms with No. 2 pick, fullback Rickey Moore of Alabama.

Vikings: Minnesota pass receiver Joe Senser denied a television report that he is quitting because of a knee injury, saying he has not made a decision. Senser missed much of the past two seasons. In 1981, he caught 79 passes for 1,004 yards.

Cardinals: St. Louis reportedly is reducing its contract offer to Freddie Joe Nunn, the team's top draft choice, by $5,000 for each day of camp he misses.

"The Cardinals say they've made their last offer," Frank Bauer, Nunn's agent, told the St. Louis Post-Dispatch. " . . . The Cardinals are not going to budge, and I'm not going to budge."

The Cardinals are said to have offered Nunn, a defensive lineman from Mississippi, a four-year deal worth close to $1.4 million. Bauer said players chosen after Nunn in the draft are signing for more.

The Cardinals also traded tight end Eddie McGill to Indianapolis for a draft choice and signed free agent center Rich Dawson.

Bears: William (The Refrigerator) Perry wasn't on hand for the opening of training camp in Platteville, Wis., because he hasn't signed a contract.

Perry, a 300-pound-plus defensive tackle from Clemson, reportedly has been offered $1.3 million for four years. His agent, Jim Steiner, said Perry wanted more money because the team wanted to base one-third of the contract on a "conditioning clause" that would pay according to Perry's physical condition, endurance, strength and percentage of body fat.

The team signed rookie wide-receiver James Maness, a third-round pick, and kicker Kevin Butler, a fourth-round selection.