Five of the balloons will have a pair of tickets for Friday's 100th anniversary game.
The balloon blitz began at 7:30 a.m., and runs until 3:30 p.m. No more than 10 balloons will be out at any time, according to a news release about the event.
Follow the discoveries on this page, which collects Tweets from the Red Sox (@RedSox is tweeting every time someone finds one) and others. Use the hashtag #Fenway100balloons to have your tweets considered.
The main contributors to The Buzz are:
- Steve Silva, Boston.com senior sports producer
- Gary Dzen, Boston.com senior sports producer
- Zuri Berry, Boston.com sports producer