Heat, Nets, Bucks are among teams that need to be major players as NBA free agency opens

NBA games are won and lost during the regular season and playoffs.

But how those games are determined happens in large part in the offseason with free agency and trades.

The Los Angeles Lakers reached a deal on a big move, acquiring Russell Westbrook from the Washington Wizards on NBA Draft day. But the Lakers still need more help, and they’ll try to improve the roster once free agency begins at 6 p.m. ET Monday.

Other teams looking to win a championship or contend for a spot in the conference finals will also be looking to add to their rosters.

Here are teams who need to make some moves in free agency: