SAN FRANCISCO — For all Joe Lacob has accomplished in his investment ventures and as the owner of the Warriors, even he couldn’t have envisioned how well his expansion Golden State Valkyries have played this season.

The Valkyries made WNBA history as the first expansion team to reach the playoffs in their first year. They surpassed the 1998 Detroit Shock for the most wins by an expansion team and set all-time attendance records by selling out every home game this season, at the 18,064-seat Chase Center. Their first-round playoff series against the league’s top team, the Minnesota Lynx, begins today in Minneapolis (10 a.m., ESPN).

“We exceeded all of our goals and that’s pretty hard to do because I set high goals,” Lacob, the team’s owner, told the Bay Area News Group this week. “I think

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