"The oldest player in the NBA Finals, 38-year-old Dallas Mavericks point guard Jason Kidd, has been showing his age in this series, in good ways and bad.

The bad?

On Tuesday night in Game 4 against the visiting Miami Heat, Kidd committed three turnovers in the first quarter.

"I have to make sure I take better care of the basketball," Kidd said Wednesday. "Especially at the beginning of the game."

But he committed just one error the rest of the way. He also didn't score a point.

On the good side, Kidd's heads-up defensive play and foul on Heat guard Dwyane Wade with 30.1 seconds remaining denied Wade an opportunity to potentially tie the score with a breakaway dunk and sent Wade to the free-throw line instead, where he missed the second of two shots, making the score 82-81.

The miss was rebounded by Dallas' Dirk Nowitzki, who, after a timeout, drove around Miami's Udonis Haslem for a layup with 14.1 seconds remaining that gave the Mavericks an 84-81 advantage.

"I wanted to get to him before he jumped because he's so athletic," Kidd said of the play on Wade.

Kidd is averaging more than 35 minutes a game in the postseason and 7.3 assists while turning the ball over 2.7 times a game, but that average is up to 4.0 per game in the Finals.

"But I feel great," Kidd said. "I feel mentally and physically good.""