"He's one of the premiere big men in the NBA and doesn't get the recognition he deserves," Indiana coach Jim O'Brien said of Wallace.
"I think he is one of the top three big men in the East. He is very difficult to defend."
Tayshaun Prince scored 17 points and Chauncey Billups 11 for the Pistons, who improved their season's record to 32-13, second only to the Boston Celtics (35-8) in the Eastern Conference.
Mike Dunleavy scored 25 points for the Pacers, who were playing without the injured Jermaine O'Neal and Jamaal Tinsley.
"They made some really big defensive stops and made big shots down the stretch," said O'Brien.
"They did what they do at the end of the game."
The Seattle Supersonics ended their team-record 14-game losing streak with an 88-85 home win over the San Antonio Spurs as rookie Kevin Durant scored 26 points and sank the winning basket.
Manu Ginobili had 29 points and Tim Duncan 27 points and 12 rebounds for the Spurs, who are without star guard Tony Parker for an indefinite period because of a bone spur in his left heel.
Antawn Jamison had 24 points and 20 rebounds as the Washington Wizards scored a 108-104 overtime win over the Toronto Raptors . Chris Bosh had 37 points and 12 rebounds for Toronto.
The Boston Celtics, missing the injured Kevin Garnett and a flu-ridden Ray Allen, hammered the Miami Heat 117-87 in Miami. The Heat have lost 16 of their last 17 games.
The New Jersey Nets snapped a nine-game losing streak with an 87-80 win over the Milwaukee Bucks.
Yao Ming had 36 points and grabbed 19 rebounds to power the Houston Rockets to a 111-107 home win over the Golden State Warriors.