4/1 KC: 3-5, 2 RBI, R

Isbel won not just a 40 man spot but an Opening Day start out of camp in 2021, slashing .333/.420/.548. He entered 2021 with just 123 Minor League games under his belt. Batting 7th, Isbel paced the team with three hits and also produced three runs in KC's 14-10 victory.

4/1 SD: 0-1

The crown jewel of the posting market in the 2020-21 offseason, Kim landed with SD, where he would have to make his name in a crowded offensive group. Heating up in May, Kim recorded a .316/.381/.579 slash between series with Colorado and Seattle.

4/1 SEA: 0-3, 2 BB, RBI, R

Emotional upon learning he'd made Seattle's Opening Day roster, Trammell had more than earned it with a huge spring .302/.388/.628. He overcame prospect fatigue and being dealt twice in as many trade deadlines. On April 19th he homered to provide the third run, then doubled to make the difference in a 4-3 win over defending World Champions LAD. The production continued thereafter as he scored the final and game-winning runs on April 29th and May 7th.

4/1 CIN: 2-4, 2B

Cincinnati had an open infield spot available out of Spring Training in 2021, and it was India, not yet on the 40-man, who seized it. The Reds moved veteran Eugenio Suarez to SS to accommodate for India's rise into the 2B spot. Fittingly, he laced his first hit for a double. He was 10-21 in his first six games, hitting safely in each contest.

4/1 OAK: 0-1

Once known just for his speed and singles hitting, Tom powered sixty extra-base hits during a breakout 2019, then landed in Oakland in the 2020 Rule V Draft. Waived and joining Pittsburgh, his first five PAs upon arriving yielded four walks.

4/1 TEX: 1 IP, 1 H, 2 BB, 2 HBP, 3 ER, 0 K

De Geus struggled in his pro debut at Ogden, but exploded upon moving to the pen in 2019. Texas took note, and picked him up in the Rule Five Draft. He was 2021's first pitching debut. In his third outing he allowed a single hit and no walks over 2.2 scoreless innings.

4/1 SD: BB, R

A back-and-fourth bout between San Diego and Arizona on Opening day saw the lead change hands four times, and Tucupita - named after his hometown in Venezuela - played a key role, scoring the 7th run for San Diego that tied the game at seven before a Jurickson Profar sac fly the next inning put the Padres up for good.

4/1 SEA: 1 IP, 1 H, 1 BB, 1 WP, 1 R, 0 ER, 1 K

Stabilizing the Mariners pen early, Vest allowed just one earned run over 10.2 innings pitched in his first nine outings. The Mariners were 6-3 in those nine games.

4/1 HOU: defensive replacement

McCormick, MLB's first Millersville position product since 1979, first joined Houston's 40 man during the postseason in 2020, though did not play during the postseason. In his first start on April 3rd he scored twice and also drove in a run in a 9-1 romp over Oakland.

4/2 CWS: 0-3, BB, R

This consensus top 25-prospect forced his way onto CHW's Opening Day roster with a huge spring. The club's hope is he will fill the shoes of the injured Eloy Jimenez. Playing four games in thee days from May 12th to 14th, Vaughn drove in runs in each, recording six total in just 32 innings of work. Heating up as the year want on, Andrew slashed .308/.347/.516 in July.