SAVANNAH — Savannah starter Gabriel Ynoa tossed six shutout innings of two-hit ball as the Sand Gnats knocked off the Charleston RiverDogs, 5-2, Monday night at Historic Grayson Stadium in South Atlantic League baseball.

The RiverDogs (24-17) fell a half game behind the Sand Gnats (25-17), who took over first place in the Southern Division standings.

Ynoa (5-2) was electric, allowing two walks while taking his strikeout total to 44 on the year with seven on the evening.

The Sand Gnats scored in the fourth inning on an RBI single by Cole Frenzel. Stefan Sabol tried scoring from second but was thrown out at home by center fielder Jake Cave.

Savannah scored two more runs in the fifth after back-to-back singles by Jeff Reynolds and Phillips Evans. Both scored on a costly throwing error by RiverDogs starter Cesar Vargas (1-2). Savannah tacked on another run in the sixth to put the game out of reach on a solo homer by Frenzel, who finished 2 for 3 with two RBIs.

Dante Bichette Jr. went 2 for 3 with two singles and a walk for Charleston, while Kelvin De Leon went 2 for 4 and drove in a pair of runs in the ninth inning.

Game 2 of this three-game series in Savannah is scheduled for 7 p.m. today. Charleston sends ace right-hander Rafael De Paula (4-2, 2.75 ERA) to the mound. Savannah will counter with left-hander Steven Matz (2-1, 2.83 ERA).

O’Brien honored

Earlier in the day, RiverDogs catcher Peter O’Brien was named SAL player of the week.

In six games last week, O’Brien hit .409, going 9 of 22 from the plate with two home runs, three doubles, eight RBIs, 12 runs scored and seven walks.