As the Chicago Cubs begin a critical four-game series against the Milwaukee Brewers on Thursday, they will get one of their most important players back.

When the Cubs hit the field, Jake Arrieta will make his return from a hamstring injury, as he will start for the team in the series opener at Miller Park.

Arrieta, who has a 14-9 record and a 3.48 ERA in 28 starts this season, suffered a hamstring strain during his last outing against the Pittsburgh Pirates on Labor Day. He has missed a handful of starts since that day, but he’ll be in line to make at least three more starts this season now that he’s back in the mix.

Chicago Cubs' 2017 Push for the Playoffs

The hurler has recaptured his strong pitching form in recent months, posting a 1.98 ERA and striking out 55 batters since the All-Star break in July.

The Cubs also announced that John Lackey, Kyle Hendricks, and Jose Quintana will start games against the Brewers, who currently trail Chicago by three and a half games in the National League Central race with just 12 games to play.