Shameless plug for MFN-26, the only league I'm in, where there are some teams available and we could use some more owners! Participants in the league are active. It's a good standard league if you are looking for one!
https://mfn26.myfootballnow.com/

Atlanta Falcons = https://mfn26.myfootballnow.com/team/29
Baltimore Ravens = https://mfn26.myfootballnow.com/team/9
Carolina Panthers = https://mfn26.myfootballnow.com/team/32
Chicago Bears = https://mfn26.myfootballnow.com/team/28
Cincinnati Bengals = https://mfn26.myfootballnow.com/team/11
Green Bay Packers = https://mfn26.myfootballnow.com/team/27
Indianapolis Colts = https://mfn26.myfootballnow.com/team/16
Minnesota Vikings = https://mfn26.myfootballnow.com/team/26
New Orleans Saints = https://mfn26.myfootballnow.com/team/30
Pittsburgh Steelers = https://mfn26.myfootballnow.com/team/10
Seattle Seahawks = https://mfn26.myfootballnow.com/team/24
Washington Redskins = https://mfn26.myfootballnow.com/team/20