Kansas City starting quarterback Matt Cassel was hit by the Ravens' Haloti Ngata while completing a pass in the fourth quarter of the Chiefs' 9-6 loss and suffered a concussion.
The Nationals, who had never come close to making the playoffs since moving from Montreal for the 2005 season, overcame a wild start by 21-game winner Gio Gonzalez to beat the Cardinals 3-2 in an National League playoff opener.
Ray Rice ran for 101 yards, Justin Tucker made all three of his field goal attempts, and the Ravens kept the Kansas City Chiefs out of the end zone late to preserve a 9-6 victory Sunday.
Wainwright, a 14-game winner in his first year back from elbow reconstruction surgery, successfully fought against restricting his innings and starts Sunday in the National League division series opener. The Nationals, who led the league with 97 wins, will go with 21-game winner Gio Gonzalez.
Two franchises, one the model of consistency, the other in turmoil. "There's been a tradition and an expectation and a standard that's been established around here recently," said Baltimore coach John Harbaugh, who will lead his Ravens (3-1) back to Kansas City (1-3) on Sunday for a matchup of two teams heading opposite directions.
The infield fly is a complicated rule, designed to prevent infielders from intentionally dropping a popup with more than one runner on base and perhaps get an extra out. No one could ever remember it being applied like this. And, after past postseasons dotted by contested calls, this play will certainly lead to another slew of October cries for more instant replay.
The St. Louis Cardinals beat the Atlanta Braves 6-3 on Friday. The Cardinals advance to face Washington in the best-of-five division round, beginning on Sunday at Busch Stadium.
Robert Quinn had three of the Rams' nine sacks on Kevin Kolb to keep the previously unbeaten Arizona Cardinals in check in a 17-3 victory Thursday night.
The Atlanta Braves haven't lost a start by right-hander Kris Medlen in more than two years.
Miguel Cabrera joins an elite list that includes Mickey Mantle, Ted Williams and Lou Gehrig.
The Cardinals, after winning 12 of their final 16 regular-season games, clinched the second National League wild card spot Tuesday and will face the Braves on Friday in Atlanta.
Not surprisingly, they're just a one-point favorite to beat the St. Louis Rams. On Thursday night against the Rams, the Cardinals will have a shot at being the NFL's first team to go 5-0 in 2012.
The Chiefs have 15 turnovers, their eight fumbles lost are double the next-worst team in the AFC and their minus-13 differential is a big reason they've been blown out in three of the four games they've played and needed a late rally to win the other.
The Detroit Tigers' 1-0 victory Wednesday night over the Kansas City Royals took a backseat to seeing Miguel Cabrera win baseball's Triple Crown.
The Rams coach is among 15 finalists for the Robert Goulet Mustached American of the Year award.
Miguel Cabrera leads the American League in batting average (.331), home runss (44) and RBIs (139) — the Triple Crown, last achieved by Boston's Carl Yastrzemski in 1967.
Alcides Esocbar and Jeff Francoeur homered for Kansas City on Tuesday night, and Salvador Perez had the go-ahead RBI in the fifth inning. The Royals won 4-2 against the Detroit Tigers.
St. Louis lost 3-1 to Cincinnati on Tuesday night, but clinched baseball's final postseason berth early Wednesday when the Los Angeles Dodgers lost 4-3 to San Francisco.
St. Louis clinched a tie for the second National League wild card and spoiled Dusty Baker's return from a mini-stroke with a 4-2 victory over the Cincinnati Reds on Monday night.
Kansas City starter Matt Cassel has thrown a league-leading seven interceptions, including three first-half picks in Sunday's 37-20 loss to San Diego.