The Houston Astros held the No. 1 pick in the 2012 draft after a 106-loss season in 2011.

Florida catcher Mike Zunino, prep outfielder Byron Buxton and college pitchers Mark Appel, Kyle Zimmer and Kevin Gausman were the headliners of the class, but the Astros opted instead for high school shortstop Carlos Correa with the first pick.

That proved to be one of the best decisions in franchise history and helped save some money to sign Lance McCullers Jr. to an above-slot bonus. They weren't the only team to add impact talent in that year's draft.

With nine-plus years to digest how things have played out, we've gone back through the draft haul of all 30 MLB teams and slapped a letter grade on the talent they acquired.

We went with A, B, C, D or F as the possible grades based on the amount of MLB talent a team's draft class produced, how it did with its first-round pick and how it used prospects to improve the roster in other ways, such as trades.

Arizona Diamondbacks

First-Round Pick: C Stryker Trahan (1-26)

Other MLB Players: RHP Jake Barrett (3-120), 3B Jake Lamb (6-213), SS Andrew Velazquez (7-243)

Another in a long line of examples highlighting the risky nature of selecting a high school catcher in the first round, Stryker Trahan failed to advance above High-A and ended his pro career after the 2016 season.

However, the Arizona Diamondbacks found an All-Star in the sixth round when they selected Jake Lamb out of the University of Washington. He had a 114 OPS+ with 29 home runs and 91 RBI during a breakout 2016 season and earned an All-Star nod the following year with a 30-homer, 105-RBI performance.

His production cratered from there, and over the last four seasons he has a .203 average and 77 OPS+ with minus-0.1 WAR in 220 games.

Grade: C

Atlanta Braves

First-Round Pick: RHP Lucas Sims (1-21)

Other MLB Players: LHP Alex Wood (2-85), RHP Shae Simmons (22-689)

The Atlanta Braves plucked right-hander Lucas Sims from their own backyard, as he starred at Brookwood High School in Snellville, Georgia, less than an hour east of Turner Field, where they were playing at the time.

Things never clicked for him in Atlanta, and he was traded to the Cincinnati Reds at the 2018 deadline as part of a package for Adam Duvall. Over the past three seasons, he has a 4.05 ERA, 1.09 WHIP and 13.0 K/9 with seven saves and 17 holds in 91 appearances.

Another local product, Alex Wood pitched at the University of Georgia, and he was one of the first players from the 2012 draft to reach the majors when he made his MLB debut on May 30, 2013. The left-hander spent two-and-a-half seasons in the Atlanta rotation before he was traded to the Los Angeles Dodgers, and he has a 3.50 ERA in 990.1 career innings as one of the most successful pitchers in this class.

Grade: B

Baltimore Orioles

First-Round Pick: RHP Kevin Gausman (1-4)

Other MLB Players: RHP Branden Kline (2-65), 1B Christian Walker (4-132), LHP Josh Hader (19-582)

Right-hander Kevin Gausman was the first pitcher selected in 2012 after going 12-2 with a 2.77 ERA, 1.08 WHIP and 135 strikeouts in 123.2 innings as a draft-eligible sophomore at LSU.

He debuted in 2013 and logged a 4.22 ERA in 763.2 innings with the Baltimore Orioles before he was traded to the Atlanta Braves. A solid starter early in his career, he has taken his game to another level the past two seasons thanks to the development of his splitter into a dominant go-to pitch.

As the ace of the NL West champion San Francisco Giants rotation in 2021, he went 14-6 with a 2.81 ERA and 227 strikeouts in 192 innings to finish sixth in NL Cy Young balloting.

The black eye here is obviously the club's decision to trade a young Josh Hader to the Houston Astros along with outfielder L.J. Hoes and a competitive-balance pick for right-hander Bud Norris at the 2013 deadline.

Grade: B

Boston Red Sox

First-Round Picks: SS Deven Marrero (1-24), LHP Brian Johnson (1-31), RHP Pat Light (1-37)

Other MLB Players: RHP Jamie Callahan (2-87), RHP Austin Maddox (3-118), RHP Ty Buttrey (4-151), RHP Justin Haley (6-211), SS Mike Miller (9-301), RHP J.B. Wendelken (13-421)

The Boston Red Sox received the Nos. 31 and 37 picks as compensation for losing Type A free agent Jonathan Papelbon to the Philadelphia Phillies in free agency. This was the final year before the qualifying offer system was adopted, and there were a whopping 60 first-round picks.

Props to the Red Sox for selecting and signing nine players who eventually reached the majors, but none of them have developed into impact players. Reliever J.B. Wendelken leads the way with 1.6 WAR for his career, all of which has come with other teams.

Alex Bregman was selected in the 29th round out of Albuquerque Academy in New Mexico, but he honored his commitment to LSU and developed into a first-round pick three years later.

Grade: D

Chicago Cubs

First-Round Picks: OF Albert Almora Jr. (1-6), RHP Pierce Johnson (1-43), RHP Paul Blackburn (1-56)

Other MLB Players: RHP Duane Underwood Jr. (2-67), 3B David Bote (18-554)

With his significant experience playing for the U.S. national team and off-the-charts intangibles, the Chicago Cubs viewed Albert Almora Jr. as a building block both in center field and in the clubhouse when he was selected sixth overall.

But his offensive game never developed as hoped, and his biggest contributions came as a defensive replacement during the team's 2016 World Series run. He had an 84 OPS+ and 3.5 WAR in five seasons with the team.

Right-hander Paul Blackburn was part of the trade to acquire Mike Montgomery from the Seattle Mariners at the 2016 deadline, while 18th-round pick David Bote showed enough versatility early in his big league career to land a five-year, $15 million extension that could stretch through 2026 with a pair of club options.

Grade: C