Vollmert is the first General to win a weekly-award in 2021.
The Generals hold a league-best 9-3 record.
Brennan Fisher went 5-for-6 in the blowout win on Friday.
There were five lead-changes in Joliet's 14-12 win on Thursday.
Alex Rakas legged out an inside-the-park home run to seal the deal in the Generals 8-2 win.
The game will resume as the first game of a doubleheader on June 26.
The Generals were held to just three hits in Thursday's loss.
A back-and-forth battle fell to the Generals thanks to clutch hitting in the ninth.
Generals' infielders and new pitching addition elevate team to win over Southland.
Joliet remains in second place in the MCL standings.
Generals lost 9-2 to break up their season-opening winning streak.
Joliet took down the Chicago American Giants in the American Giants' first game in the MCL.
Generals swept the season-opening doubleahder against the Panthers.
Weather and field conditions were the primary causes of Friday's cancellation.
Four returning Generals will take the field for Joliet in 2021.
The Generals announced their final additions to the 2021 roster.
The Joliet Generals have announced the rest of their infield roster as well as their outfielders for the 2021 season.
The Generals announced their catchers and some infielders for the 2021 season.
Adam O'Malley from Harper College will join Joe Silva's coaching staff for the 2021 season.
The Generals 2021 pitching staff will return one player from last year's roster.