Agony of Defeat: Close calls and big losses

Losses. Bad breaks. When these things happen, players and coaches and fans wear the fallout on their faces, showing a side of sports that's painful -- but also compelling. Playbook is working with the Tumblr "The Agony of Defeat" to find the most eye-catching photographic examples each week.

Here are the selections from the past seven days, mostly from football as the season heats up:

To see more photos like this, visit The Agony of Defeat on Tumblr.