KANSAS CITY, Mo. (AP) — Chiefs defensive lineman B.J.

Thompson remained hospitalized but was awake and responsive on Friday, one day after the second-year pro experienced a seizure during a team meeting and went into cardiac arrest at the Kansas City practice facility. Chiefs trainer Rick Burkholder said the 25-year-old Thompson was placed on a ventilator and heavily sedated Thursday night at the University of Kansas Health System. He was brought out of sedation on Friday and his prognosis is good.

“He's alert. He's a wake. He's coming through quite well,” Burkholder said.

“We don't have a diagnosis and in medicine sometimes you don't have that. But he's awake and alert and he's headed in the right direction.” Thompson, a fifth-round draft pick out of Stephen F.

Austin last year, was in the meeting room before the Chiefs were scheduled to have their final voluntary workout of the offseason. He began to have a seizure and kicker Harrison Butker immediately ran to the trainer's room and summoned assistant trainers Julie Frymyer and David Glover. They were joined by Burkholder in helping Thompson as he went into cardiac arrest.

Dr. Jean-Philippe Darche soon arrived from the Kansas Health Sports Medicine and Performance Center, which adjoins the practice facility. “Our team of that group of people provided CPR for him,” Burkholder said.

“He had one AED shock and came back. He was in cardiac arrest for less than a minute, a minute and a half. Our players, security .