Silva and Vincent are the first Generals to ever win Manager of the Year and MVP.
Joliet won all four games in the MCL Playoffs when faced with elimination.
Jacob Small's walkoff single scored Brandon Matias, who scored twice and drove in two runs in Saturday's win.
Joliet now has to win back-to-back games against the Oilmen in order to secure the title.
The Generals will make their first ever MCL Championship appearance.
The series-finale will take place Thursday evening at Oil City Stadium.
Joliet has to win back-to-back games in order to win the semifinal series against Crestwood.
The Generals await the regular-season results of the Vikings and Panthers, who are fighting for the three seed and a matchup against Joliet.
The Generals find themselves one game back from fist place heading into Oil City on Friday night.
Joliet has clinched a playoff spot, and is two games out of first place.
Joliet now find themselves a full game out of first place.
The Generals and Oilmen will meet once more on Friday night at Oil City Stadium.
The Generals finish the season-series with a 7-2 lead.