The Curve fell 5-3 to Richmond in the series and pre-break finale Sunday afternoon before 3,845 fans at Peoples Natural Gas Field to drop their second-half record to 7-11.
Richmond scored three times off starter Connor Oliver, who made his second start of the series, and spun two innings. He allowed three earned runs on four hits, including a two-run homer from Richmond's Jean Carlos Sio.
Altoona stole four bases in the game, two after a first-inning single from Keiner Delgado, who scored on a sacrifice fly from Derek Berg.
The Curve offense was held quiet by starter Trystan Vrieling, who allowed just one hit over six innings.
Lonnie White Jr. blasted a solo homer in the seventh inning to make it a 5-2 game and the Curve inched a run closer with an RBI single from Duce Gourson in the eighth.
However, Richmond's bullpen stranded two on base in the eighth and didn't allow a baserunner in the ninth to secure the win.
Callan Moss and Titus Dumitru each lost their lengthy on-base streaks in the loss. Moss' 15-game stretch and Dumitru's 14-game streak both came to an end via 0-for-4 days.
Saturday's game
The Curve beat the Flying Squirrels 5-1 in front of 6,606 fans on Saturday night at PNG Field.
It was the largest crowd of the season at PNG Field.
Starter Kyle Robinson fired six solid innings, scattering seven hits and three walks, and earned his first win with the Curve.
Gourson slammed a two-run homer on the first pitch he saw from Richmond starter Tyler Switalski to give the Curve a first-inning lead.
In the second inning, Dumitru doubled in a pair of runs to push the Curve to a 4-0 lead. Altoona added another run in the third on an RBI single from Shalin Polanco.
Up next
Altoona will be off until Friday for the All-Star break before traveling to Reading for a three-game series with the Fightin Phils. Altoona will send LHP Dominic Perachi to the mound in the series opener.