It's possible that Madison Bumgarner made his last start for the Giants on Saturday at Oracle Park.

Charley Walters, a columnist for The Pioneer Press in Minnesota, reported that the Twins are "moving closer to a trade with the Giants for left-handed starter Madison Bumgarner."

Don't get too worked up just yet.

Darren Wolfson, a sports reporter for KSTP-TV in Minnesota, isn't ready to say a deal between the Giants and the Twins is close.

I have no doubt that @Charley_Walters received this information from someone very plugged in. Can add late tonight that someone very plugged in says this is premature. But I also have no doubt that it's worth monitoring even closer moving forward. #MNTwins pic.twitter.com/qkZdsMvRGm — Darren Wolfson (@DWolfsonKSTP) June 16, 2019

Bumgarner is the Giants' biggest trade chip, and he's expected to fetch them a haul of prospects before the July 31 trade deadline. A deal this far away from that deadline would be a surprise, though, as the team might want to wait longer for more suitors and richer offers.

The Twins aren’t one of the eight teams on Bumgarner's no-trade list, so that would make it easier for the Giants to facilitate a trade with Minnesota, which has surprised everyone this season and owned the best record in baseball through Saturday.

In 14 starts this season, 29-year-old Bumgarner has a 3.83 ERA and struck out 84 batters in 87 innings.

[RELATED: Will Smith remains focused as trade rumors swirl]

With the Giants in last place in the NL West, president of baseball operations Farhan Zaidi could start trading off his valuable pieces to restock the farm system. Along with Bumgarner, you can expect veteran relievers Will Smith, Tony Watson and Sam Dyson to be traded by the deadline.