(Updated Sept. 13)

There are three weeks remaining in the regular season, and three of the six division races already seem to have been decided.

(Welcome to the postseason, Royals, Cardinals and Mets.)

With only two teams at 20 games over .500 or better, the American League is difficult to figure out. The National League -- with five clubs at 20 games over .500 or better -- is just plain brutal.

Is this the year the Royals finally win it all?


Or will the Mets continue their amazing run?

Here's what we think we know: There are six teams that can win it all.

With apologies to Astros and Cubs fans, we narrow down the championship field to these half-dozen clubs:

Toronto Blue Jays

The Jays are 32-10 since July 29 -- the day before they acquired David Price and the day after they traded for Troy Tulowitzki.

The Jays have scored 790 runs in their first 142 games -- 102 ahead of the second-place Yankees in that category. They also lead MLB in OPS (.791), homers (202), on-base percentage (.337), slugging (.454), total bases (2,190) and extra-base hits (481).

They have a leading MVP candidate in Josh Donaldson, and the trio of Donaldson, Edwin Encarnacion and Jose Bautista have combined to average 35 homers, 106 RBI and 95 runs. To win it all, however, they'll need a healthy Tulowitzki, whose postseason status is a question because of a shoulder injury.

Price has been excellent in eight starts with Toronto (6-1, 2.28 ERA, 1.01 WHIP, 10.6 strikeouts per nine innings), and the Jays will need Mark Buehrle (14-7, 3.72) and Marco Estrada (12-8, 3.31) to continue to produce.

Kansas City Royals

The Royals -- who are fifth in runs and eighth in ERA -- are the AL's most balanced team.

They have six regulars -- Ben Zobrist, Lorenzo Cain, Eric Hosmer, Kendrys Morales, Alex Gordon and Mike Moustakas -- batting at least .284 with an OPS of .808 or higher. Kansas City leads MLB with a .272 average, and is seventh in OBP (.324) and eighth in OPS (.737).

The biggest question, at least to us, is can the Royals depend on Johnny Cueto? In his first nine starts with K.C., the right-hander is 2-6 with a 5.59 ERA. Cueto had a 2.62 ERA and 0.93 WHIP in 19 starts for the Reds prior to being acquired in a big deadline deal for the Royals.

The Royals still have an excellent bullpen, one that is second in MLB in ERA (2.70), WHIP (1.11) and opponents' batting average (.208). But their starters rank 21st with a 4.37 ERA, and their ace right now probably is Edinson Volquez (13-7, 3.49 ERA, 1.27 WHIP).

We still like the Royals' chances of returning to the Fall Classic, but Cueto's regression has us concerned.

New York Mets

In the 40 games in which Yoenis Cespedes has played, the Mets are 29-11. Since a 49-48 start, they are 33-13.

Cespedes, believe it or not, is their only regular who is hitting at least .275, and he's been so good (hitting .308 with 16 homers and 41 RBI in 40 games) some are touting him as an unlikely NL MVP candidate.

If the Mets are going to win their first title since 1986, it will be because of a pitching staff that ranks third in ERA (3.35) and first in WHIP (1.17). The Mets' starters are a combined 59-44 with a 3.45 ERA.

We've chronicled the excellence of the Mets' young arms already, but their chances of advancing in a loaded NL could come down to the availability of Matt Harvey. It's a question that will be hovering over the team for the next month or more.

St. Louis Cardinals

Even after losing eight of their last 11 games, the Cardinals are 35 games over .500.

Matt Holliday has a quad injury that might sideline him through the regular season. Matt Carpenter is the only regular with at least 16 homers, and the only one with 60 RBI or more.

Still, the Cards have mostly rolled, helped by solid contributions by a pair of 24-year-old rookies -- Randal Grichuk (16 homers, 46 RBI and an .895 OPS in 90 games) and Stephen Piscotty (hitting .326 with an .872 OPS in 48 games).

Should the Cardinals win their third World Series since 2006, it likely will be because of a pitching staff that has MLB's top ERA (2.88). The Cards' starting rotation is a combined 63-37 with a 3.02 ERA (the best in baseball). How's this for a top five: Michael Wacha (15-5, 2.96 ERA, 7.6 Ks per nine), John Lackey (11-9, 2.89), Lance Lynn (11-10, 3.17, 8.8 Ks), Carlos Martinez (13-7, 3.12, 9.2) and Jaime Garcia (8-5, 2.33 ERA and 1.01 WHIP in 16 starts).

And that's without Adam Wainwright.

Pittsburgh Pirates

Andrew McCutchen -- who has hit at least .298 with a .911 OPS or better, and per-season norms of 25 homers, 89 RBI, 18 steals and 95 runs since 2012 -- is headed for another lofty finish in the MVP race. And Jung Ho Kang has been even better than advertised, hitting .290 with 15 homers, 58 RBI and an .826 OPS in 122 games.

Pittsburgh's ERA is second to St. Louis' at 3.18, and the Pirates' starters are a combined 59-42 with a 3.42 ERA (No. 3 in MLB). The Buccos have a no-doubt-about-it ace in Gerrit Cole (16-8, 2.54 ERA, 1.12 WHIP, 8.7 Ks per nine), and a solid 2-4 combo in Francisco Liriano (10-7, 3.45, 9.8 Ks per nine), A.J. Burnett (8-5, 3.14) and J.A. Happ (a surprisingly great 5-1 with a 1.79 ERA and 0.99 WHIP since being acquired from the Mariners).

The unfortunate part: As good as the Pirates have been (they entered the last three weeks of the season 30 games over .500), they could be forced to play a wild-card game against Jake Arrieta and the Cubs. What a division.

Los Angeles Dodgers

The Dodgers are 19th in runs and 19th in average, Joc Pederson is hitting only .195 with a .687 OPS in the second half, and Yasiel Puig has been limited to 77 games by injury.

No chance, right?

We'll give you two reasons -- and only two -- why we believe anything can happen once they get to the postseason.

Zack Greinke and Clayton Kershaw are a combined 30-9 with a 1.88 ERA and 0.87 WHIP, and they're allowing only 6.3 hits per nine innings. Greinke -- the Cy Young favorite, though we'd still pick Kershaw -- has been amazing (17-3, 1.61 ERA, 0.85 WHIP).

Since the start of July, Kershaw has started 12 games. He's 8-0 with a 0.96 ERA, 0.73 WHIP, and norms of 11.4 strikeouts and 5.6 hits allowed per nine.

Yes, he's struggled in his postseason career, but we'd be shocked if that trend continued this fall.