Mark Mosley sat on the bench inside the Washington Redskin locker room unlacing that snub-nosed shoe that booted the Tampa Bay Buccaneers into submission Saturday night, 9-7, in the exhibition opener for both teams. Mosely wasn't particularly pleased with his performance.

"I really shouldn't have missed those two shots," said Mosley, referring to two wide-to-the-right field goal attempts from the 45 and 46. "The first one I hit real bad and I don't think I lined up right on the second one. I shouldn't be missing those kind of shots."

But without Moseley's talented toe, the Redskins might well have come up loser. Washington had seven possessions within the 50-yard line and just couldn't manage to break through the Bucs' Defense.

Moseley may have been peeved, but most of the Redskins savored their first win of the season.

"I'm very optimistic," said quarterback Joe Theismann. "I made a few bad throws in the first half but I don't think any of us made any real bad mistakes. I really respect Tampa Bay's defense, and I think they did a good job.

"We want to win, but it wasn't dominating a factor as you might think. Our main goal was to control the game as much as possible and I think we did that."

Redskin Coach Jack Pardee wasn't worried that his team didn't generate a more potent offense.

"This early in the season, you just can't get upset about that," said Pardee. "On just about every down, we had some type of missed assignment that would stop us. But overall, I was very pleased that we made no major mistakes. The piecemeal offensive line we had to put together really did a fine job. Give them some credit."

Understandly, Pardee was also pleased with the efforts of Washington's defense. The defensive unit forced three Tampa Bay fumbles and picked off one Doug Williams pass to set up the field goals.

Linebacker Brad Dusek started it off with an interception near midfield late in the first quarter. The play was nullified by a penalty, but Dusek raced in front of another pass by Williams on the next play, dashing to the Tampa Bay 38-yard line. Five plays later, Moseley booted it through with 2:17 left in the quarter for a 33-yarder.

"How'd you like that, said Pardee. "You don't see back-to-back interceptions very often. I thought Brad did a fine job."

Defensive end Joe Jones forced the second Buc miscue with seconds remaining in the first half, Jones broke through the line and bashed into Tampa Bay running back Jerry Eckwood, jarring the ball loose. Mark Murphy recovered and Moseley booted a 31-yard shot three plays later.

Rich Milot did the final damage with 2:36 left in the third period. He slammed into Buc quarterback Mike Rae from behind and Washington took over at the Tampa Bay 47. Nine plays later, Moseley put the Redskins ahead to stay. CAPTION: Picture, Washington fullback John Riggins bulls through the Tampa Bay defense for big gain in the first quarter. AP