First impressions are everything, especially in the minor leagues. Now that the first month of the season is in the books, teams will now begin to assess those players that made a statement to start the year, and determine who is worth keeping an eye on throughout May. If they continue to preform, a midseason promotion will become a serious possibility. Here are six players who caught our attention in April.

Hitters

Amed Rosario (SS, St. Lucie Mets)

It was surprising enough that the Mets chose not to start Rosario at Double-A Binghamton, so it would be even more shocking if the 20-year-old phenom is not promoted before the end of the month. In just 23 April games, Rosario managed to silence those who questioned his ability with the bat, by hitting .310/.343/.530 with three home runs and 16 runs batted in. The RBI total is ten shy of what he recorded in 2015, and the three longballs match his career high. With the weather getting warmer and Binghamton, and Niuman Romero failing to impress as the incumbent, all signs point to Rosario getting the call very soon.

Vinny Siena (2B, Columbia Fireflies)

There was no question that Siena was a solid hitter coming into the season, but the numbers he’s put upso far only improve his chances of rising through the ranks quickly. In his first 24 games this year, the former UConn second baseman has reached base safely in 23 of them, earning him a .475 on base percentage which is 2nd in the league.

We first saw what Siena’s talents could do in his professional debut at Brooklyn last year, when he hit .336 through his first 30 games. If he is bumped to St. Lucie when Rosario moves up, there will be a spot open at second base with Luis Guillorme sliding back over to shortstop.

David Thompson (3B, Columbia Fireflies)

The answer to “who has the most RBI in affiliated baseball through May 1?” is not Bryce Harper, or even Rockies breakout rookie Trevor Story. The mystery man is Thompson, who knocked in an astounding 27 runs in April. The 22-year-old was a common name when 2016 Mets breakout prospects were being discussed before the season, and he has certainly not disappointed.

As a fourth round draft pick in 2015, Thompson carried lofty expectations with him to Brooklyn, where he struggled mightily at the plate with a .218 average, and in the field, recovering from a shoulder injury. Seemingly at 100 percent, Thompson is poised to prove he could be the Mets’ third baseman of the future, and the next stop is St. Lucie.

Pitchers

Casey Delgado (RHP, St. Lucie Mets)

Delgado might not be a top prospect, but he’s sure pitched like one through four starts in the Florida State League. The Mets caught the 25-year-old pitching in the independent leagues last year, and he was solid through 16 starts with the Sand Gnats. Delgado has shown to have good strikeout numbers thus far, fanning at least five in each outing this year, and limited his walks. Although the numbers have come in a small sample size, it’s safe to say that his maturity and performance out of the gate could serve him well in Double-A.

Tyler Bashlor (RHP, Columbia Fireflies)

In one of the feel-good stories from the first month of the season, Bashlor has been absolutely dominant for the Fireflies. After not throwing a pitch in a game for over 31 months due to Tommy John surgery, Bashlor returned to the mound with a vengeance.

The 23-year-old has struck out 15 batters in 11.2 innings so far, including five in two innings on opening day. Bashlor has also reportedly reached the 96-97 miles per hour range with his fastball, which is a welcome sign for anyone returning from a significant elbow injury. Given his age and immediate impact, it’s likely he’ll be called upon to bolster St. Lucie’s bullpen sometime soon.

Tim Peterson (RHP, St. Lucie Mets)

The 25-year old right-handed has had a spectacular start to 2016, allowing only one earned run in 11 innings on a measly four hits. He has struck out 18 compared to only one walks and has given up four hits. The Mets 20th round pick from 2012 already made one appearance for the Binghamton Mets and given his age and success he could be headed back to Bingo very shortly. Fellow St. Lucie reliever Kevin McGowan (our Relief Pitcher of the Month) could also get bumped up soon.