Former Detroit Lions general manager Matt Millen was not exactly well-liked during his tenure with the Lions, as he became synonymous with the franchise's losing culture in the early 2000s.

However, now, Lions fans will be rooting for Millen.

Millen underwent successful heart surgery on Monday morning, according to Peter King of Pro Football Talk.

“Doctors said the heart was a perfect match and he is doing well,” said Millen's wife, Pat. “The surgery went smoothly.”

Awesome to hear that Millen is doing well.

The 60-year-old, who played in the NFL as a linebacker from 1980 through 1991, took over as Detroit's general manager in 2001.

His first season was disastrous, as the Lions went just 2-14, marking their lowest win total since 1948. The worst part was, things didn't get much better afterward.

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Detroit won just three games the following year, and in Millen's last season with the Lions in 2008, the team went winless, making them the first 0-16 ballclub in NFL history.

Detroit parted ways with Millen after that season, and overall, the Lions went 31-97 during Millen's eight-year tenure, failing to make the playoffs once. Their best mark over that span was 7-9, which they achieved in 2007.

Since Millen departed, Detroit has made the postseason three times.

As a player, Millen was quite a bit more successful, winning four Super Bowls with three teams. Two came with the Los Angeles Raiders, and he split the other two between the San Francisco 49ers and the Washington Redskins.

He also made a Pro Bowl in 1988 and was a two-time First-Team All-Pro selection.