What happened: The Baltimore Ravens backed the renewed effort with a tribute honoring four people affected by ALS. The campaign returned in July to raise awareness and research support.
Why it matters: The revival brings NFL attention back to ALS fundraising more than a decade after the original push. Participation has
By the numbers: The original challenge raised an estimated $135 million in the United States and $220 million worldwide.
What to watch: Additional participants and fundraising totals will show how far the revival spreads.