There's a team in one of my leagues that started the season 7-7. He's now 24-7. Yes, a current 17 game win streak. What's the longest win streak you guys have ever seen here?

i've seen 20+ in theme leagues,i'm sure theres been longer in open leagues

The longest I've seen is 29 games in leagues where everyone is trying to win. In FGY7 (everyone is trying to lose), where an owner is trying to win, I've see a few teams go 162-0.

I have won somewhere around. 24-28 games in a row.  The really odd part was that the team trailing me in the standings also won 18 or so in a row.

Ed Walsh went 40-0 in the very tough and competitive All Years Progressive. This was in season 8, 24 teams. We started Season 1 and drafted all rookies and have just progressed them one year at a time. A player can be cut after any season and replaced with another rookie not previously taken. That Walsh season was the most amazing one I have seen. I once had Greg Maddux go 70-3 using the old (and defunct)  Long A strategy.

I can't recall - two seasons ago in a two-season progressive, my Philadelphia team had a winning streak - I think around 16 or 17 wins, can't recall, it had played under .500 all season and ended up one game out of the wildcard playoff spot.