The Kansas City Chiefs have made their roster cuts before the 3:00 p.m. (Arrowhead Time) deadline to get down to the league-mandated 80-man roster limit. Haley said (via @JoshLooney) that the Chiefs released K Todd Carter and placed OT Ryan O'Callaghan on injured reserve, which puts them at 80 players.
They were previously at 89 players but released seven players yesterday.
Carter was added on Aug. 10 as the Chiefs second kicker in camp. He has a very strong leg, which Haley noted the other day. It's possible he was brought in to tinker around with the league's new kickoff rules. That, or you just want an extra kicker in camp.
The Chiefs picked up O'Callaghan off waivers shortly before the 2009 season and started 12 games that year. In 2010, O'Callaghan was injured during training camp which paved the way for OT Barry Richardson to step in at right tackle, a position he didn't give up all year.
This means that the Chiefs are at 80 players for Thursday night's preseason finale against the Green Bay Packers. Two days after that game, on Sept. 3, the Chiefs will need to get down to 53 players.
Speaking of O'Callaghan, he's a good example of what can happen here over the next couple of weeks. He was signed on Sept. 6, 2009, right after he was released by the New England Patriots on the final cut down day. Players similar to O'Callaghan will be available come Sept. 3, the final cut down day this year.
(H/T kcsno56)