Jack Bell continued to dominate on the mound in the 6-2 loss.
Seegers is the first General in 2021 to be awarded Player of the Week.
The Generals' four-game win streak came to a halt with their 11-8 loss on Sunday.
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.