The diagnosis is simple dehydration. "Overheated. Dehydrated," coach Mike Singletary told the Santa Rosa Press Democrat after Tuesday's practice. "Just had to go in and get some IVs."
Barrows recalls the scary incident from up close on his Sacramento Bee 49ers blog. "I happened to be watching (Rachal) at the time," Barrows writes. "Offensive line coach Mike Solari was yelling his name, 'Chilo! Chilo!' when Rachal listed a little to his left and went face-first into the grass."
"He stayed down for about eight minutes before being carted into the locker room," Barrows writes.
Fans can't help but recall rookie Thomas Herrion's untimely death from an undiagnosed heart disorder after a 49ers exhibition game against the Broncos in 2005 , and understand the abundance of caution.
Rachal will be held from physical practicing until later in the week.