Things are starting to get real in the Ultimate Cubs Lineup Tournament.

We’re days away from crowning a champion and seeing who truly put together the best combination of former Cubs players.

Monday marked the Day 1 of the second round, packed with a bunch of late rallies to decide the fate of four of our analysts.

For more on our Ultimate Cubs Lineup project, head here.

All matchup simulations were run by Strat-O-Matic, the market leader in sports simulations.

Mark DeRosa vs. Jim Deshaies

FINAL: DeRosa 7, Deshaies 4

Deshaies actually jumped out to an early 1-0 lead in this game and led 4-1 heading into the 7th inning. But Team DeRosa rallied, scoring a pair of runs in both the 7th and 8th frames and then adding another tally in the top of the 9th.

In the 7th, DeRosa received some surprise support from his starting pitcher when Greg Maddux doubled to drive in a run. Two batters later, Billy Williams followed with a sacrifice fly to tie the game.

In the 8th, Sammy Sosa and Aramis Ramírez both hit solo home runs and Williams added a solo shot of his own in the top of the 9th to close out the scoring.

Maddux picked up the win for Team DeRosa, tossing 8 strong innings with 9 strikeouts and actually allowed more runs (4) than hits (3).

Deshaies’ squad made the hits count, as Rogers Hornsby followed up a Kiki Cuyler single with a triple in the 4th inning and in the 6th, Ernie Banks homered after Cuyler was hit by a pitch and Stan Hack walked.

Mordecai “Three Finger” Brown, Deshaies’ reliever, picked up the loss after allowing the final 3 runs of the ballgame.

DeRosa now moves on to the semifinals, which take place Wednesday on Cubs 360 Daily at 7:30 p.m.

Wright vs. Glanville

FINAL: Glanville 4, Wright 3

We have another wild walk-off finish.

Both teams were tied at 3 going into the 10th inning when Aroldis Chapman walked Billy Williams with the bases loaded to force in the winning run.

Prior to that, Chapman — in his 4th inning of work as Wright’s reliever — allowed a 1-out double to Kiki Cuyler, intentionally walked Ryne Sandberg and then struck out Anthony Rizzo. But Ernie Banks came to the plate and reached on an error by Wright’s version of Sandberg at second base to load the bases.

Because of the error, the winning run is unearned, so Chapman was the unfortunate loser of this close ballgame despite not allowing an earned run in 3.2 innings and racking up 5 strikeouts. Wright’s starter, Greg Maddux, struck out 10 and gave up 3 runs in 6 innings.

For Glanville, Sandberg and Ron Santo hit home runs to help send the game to extras. Fergie Jenkins picked up the win, tossing a 10-inning complete game and striking out 12 Wright batters.

Team Wright was led offensively by Sandberg, Banks and Derrek Lee, who each had 2 hits.

Glanville now moves on to the semifinals, which take place Wednesday on Cubs 360 Daily at 7:30 p.m.