The Salem Avalanche extended its winning streak to five games, using a four-run 10th inning to spoil a fine pitching performance by Potomac's Robert Smith and defeat the Cannons, 5-1, in a Class A Carolina League game before 1,006 at Pfitzner Stadium last night.

Salem designated hitter Whitey Schwartzbauer lined a one-out single into center field in the 10th inning, scoring Miguel Correa and Doug Livingston to give the Avalanche a 3-1 lead. Salem added two more runs, and Travis Thompson retired the Cannons in order in the bottom of the inning to end the game.

Potomac pitchers had given up 25 runs in the previous two games, but Smith appeared on the verge of ending the Cannons' recent pitching woes. He yielded one run on two hits over 7 2/3 innings, but the bullpen could not protect Smith's lead.

After giving up a double down the left field line to second baseman Doug Livingston with one out in the seventh inning, Smith struck out Schwartzbauer -- and then was pulled for stopper Jason Marr.

Pinch hitter Jody Gerut lined Marr's first pitch into center field to score Livingston and tie the score at 1.

Smith was making his second start for the Cannons (20-38). He yielded five runs in five innings and lost his first start at Wilmington on Wednesday, but had not allowed a hit for 23 straight batters after yielding a single to Jerome Alviso to open the game.

With Smith pitching so well, "there's no chance of him getting the loss," said Potomac Manager Joe Cunningham on his reason for pulling Smith with two outs in the seventh inning.

"Then he's going to be wondering, `What do I have to do get a win?' There's no chance he was going to get the loss. Who knows? He may have gotten the next guy out."

Potomac jumped ahead 1-0 on two doubles in the fourth inning. Taber Maier broke up Shawn Chacon's no-hitter with a line drive down the right field line. Two hitters later, designated hitter Andy Bevins put the Cannons ahead on a double into the right field corner, scoring Maier.

KEYS 11, WARTHOGS 8: For the second straight game, visiting Frederick won a slugfest against Winston-Salem as Keys center fielder Luis Matos led a six-run second inning with a grand slam in the Carolina League game.

The two teams combined for 28 hits, eclipsing their total of 27 hits in Sunday's game -- an 8-7 Keys victory.

Down 10-1 after five innings, Winston-Salem (31-26) rallied with seven runs in the next three innings. John Parrish (2-2) got the win for Frederick despite giving up six earned runs on 11 hits.

CURVE 5, BAYSOX 2: In a Class AA Eastern League game, Altoona right fielder Alex Hernandez drove in two runs with a third-inning double and visiting Bowie continued to struggle at the plate. The Baysox were held to seven hits after managing two in their shutout loss to Trenton Sunday. Left fielder Wady Almonte drove in Bowie's two runs with a sixth-inning double.