March Madness has begun! Here is what to know, including the favorites and underdogs as well as key games and how to watch the NCAA Tournament. Oh, and how to fill out your brackets!

HOW TO WATCH

Every game of the men’s tournament will be aired — here is a schedule — either on CBS, TBS, TNT or TruTV and their digital platforms. CBS, which also has a handy schedule that includes announcing teams, will handle the Final Four semifinals and national title game this year.

The NCAA will again stream games via its March Madness Live option, and CBS games will be streamed on Paramount+. Fans of longtime play-by-play announcer Jim Nantz should soak up every moment: It’s his final NCAA Tournament.

TOP SEEDS

The top four seeds in the tournament are Alabama, Houston, Kansas, and Purdue. Each is in a region, some tougher than others (on paper), and each has had its share of headaches to set up what could be a chaotic tournament. We break them down for you:

EAST REGION:

The Boilermakers got a No. 1 seed for the fourth time after edging Penn State 67-65 in the Big Ten championship game, but they face potential hurdles in Memphis and surging Duke. Memphis (26-8) is fresh from a big upset of top-ranked Houston and led by Kendric Davis. Duke (26-8) shut down Virginia in a 59-49 ACC title game win.

SOUTH REGION:

Alabama, led by coach Nate Oats in a challenging season, is a No. 1 seed for the first time after sweeping the Southeastern Conference regular season and tournament titles behind league player of the year Brandon Miller, who has armed security on hand after being the subject of threats. They opened the tourney not far from home, in Birmingham, Alabama. Potential hurdles for the Crimson Tide could include Baylor and Arizona. Furman celebrated its first tourney appearance since 1980 by knocking off No. 4 seed Virginia 68-67 on a 3-pointer with 2.4 seconds left.

MIDWEST REGION:

Houston (31-3) got a top seed despite stumbling 75-65 against unranked Memphis in the American Athletic Conference title game, minus league player of the year Marcus Sasser (strained groin). They opened against Northern Kentucky (22-12). Potential hurdles could include Penn State, which took Purdue down to the wire in the Big Ten, and SEC Tournament runner-up Texas A&M.

WEST REGION:

The Jayhawks fell 76-56 to Texas in the Big 12 championship game and they wound up with the top seed in a stacked region. They opened against Howard (22-12), making its first NCAA Tournament appearance since 1992. Potential hurdles include No. 6 TCU (21-12), which beat Kansas at Allen Field House 83-60 on Jan. 21, and Arkansas (20-13).

GAMES TO WATCH

No. 7 Texas A&M (25-9) vs. No. 10 Penn State (22-13)., Thursday, 9:55 p.m. ET (TBS) The Aggies, who felt snubbed last season, are making their first NCAA Tournament appearance since 2018, and the Nittany Lions’ drought dated to 2011. Both flirted with league tournament titles and have been hot. Texas A&M went 19-4 after a loss to Wofford and Penn State has won eight of 10.

No. 5 Miami (25-7) vs. Drake (27-7), Friday, 7:35 p.m. ET (TBS). The game features two conference players of the year, Miami’s Isaiah Wong in the ACC for the regular-season co-champions, and Drake’s Tucker DeVries from the Missouri Valley Conference tournament champs. DeVries is averaging 19 points while Wong leads the team in scoring (16.2 points per game), assists and steals. Drake made the Elite Eight three years running, though it has been a while (1969-71).

No. 6 Kentucky (21-11) vs. No. 11 Providence (21-11), Friday, 7:10 p.m. ET. (CBS). Led by last year’s AP player of the year Oscar Tshiebwe, the Wildcats are trying to avoid back-to-back first-round exits after that infamous defeat to Saint Peter’s. The Friars, meanwhile, went to the Sweet 16 before losing to eventual champion Kansas. They’re led by Kentucky transfer Bryce Hopkins.

GO DEEPER

Gun violence has cost lives and disrupted college sports all season, touching some of the top programs in college basketball, including Alabama. Coaches have been thrust into uncertain and unwelcome roles in trying to navigate the topic — as well as the fallout from the Supreme Court decision to overturn Roe vs. Wade.

On a lighter note, if you feel you know March Madness pretty well, try this 25-question trivia quiz put together by AP.

PLAYERS TO WATCH

The NCAA Tournament is filled with great players, and the AP All-America team is a good place to get familiar with the names. It’s also an event where guys you’ve never heard of — no offense, Drake — can take a star turn. Guard play is always going to be important (see: Baylor, 2021 title winner) and there are some NBA prospects in the mix.

Bet on this, too: Some player — maybe more than one — will have a chance to join the mustachioed Doug Edert (remember Saint Peters’ inspiring run last year?) and find a way to cash in on their celebrity.

BETTING GUIDE

Who’s going to win the national championship? The betting favorites this week to reach the Final Four are Houston, Alabama, Purdue and either Kansas or UCLA, according to FanDuel Sportsbook.

MARCH MADNESS CALENDAR

Selection Sunday set the bracket matchup s for the First Four and first- and second-round games that stretch from Florida to California. Sweet 16 weekend will see games in New York City (East Region), Las Vegas (West), Kansas City, Missouri (Midwest), and Louisville, Kentucky (South).

Where is the Final Four? In Houston, on April 1, with the championship game on April 3. Basketball aficionados, take note: The women’s NCAA Tournament will hold its Final Four in Dallas, a four-hour drive up the road from Houston.

Can’t get enough March Madness? Well, there is talk about expanding the tournament despite a host of challenges. Enjoy the 68-team version for now! ___ AP March Madness coverage: https://apnews.com/hub/march-madness and bracket: https://apnews.com/hub/ncaa-mens-bracket and https://apnews.com/hub/ap-top-25-college-basketball-poll and https://twitter.com/AP_Top25

Photo Credit: Matt Pendleton-USA TODAY Sports