MIAMI -- Text messages and phone calls have been non-stop for Marlins president of baseball operations Michael Hill, and there are no signs of slowing down before Wednesday’s 4 p.m. ET Trade Deadline.

With less than two days remaining, the Marlins continue to explore ways to deepen the talent pool throughout the organization, which means they are targeting on position players who are close to being big league ready.

“Starting today through Wednesday, there will be a flurry of things,” Hill said on Monday morning during a Marlins community event. “We are a very deadline-oriented industry, and I think truthfully a lot of clubs were waiting as late as they could to see if they really think they're in and how they're going to approach the Deadline. Are they going all-in? Are they going to be systematic and maybe go for more control? It's playing it both ways.”

Hill spoke at a field renovation project at Tropical Park in Miami, a team initiative to help upgrade baseball facilities in Miami-Dade County.

The Marlins also are in the process of building an organization from the Minor League system up.

On Saturday, they completed one trade, sending closer Sergio Romo, pitching prospect Chris Vallimont, and a player to be named to the Twins for Double-A first baseman Lewin Diaz.

As part of the deal, the Twins agreed to pay the remaining $874,000 on Romo’s $2.5 million salary.

The players the Marlins are focused on moving the most are veterans with expiring contracts: infielder Neil Walker and second baseman Starlin Castro.

Castro is making $11 million this season, and his contract includes a salary of $16 million in 2020 with a $1 million buyout. Counting the buyout, Castro is owed $4.7 million, which is a sticking point for clubs.

Walker is more affordable, at $2 million. The rest of the season, he is still owed $678,000.

“We're just trying to take advantage of the market and maximize our assets,” Hill said. “Sergio Romo was going to be gone in two months. Chris Vallimont is an area of depth for us. That's how we're going to approach this. If we have pieces that we think can allow us to access other championship pieces that we might not have, we're going to explore it.”

Worth noting

• Catcher Jorge Alfaro is dealing with a tight quad after crashing into the railing in front of the D-backs dugout on Saturday night. He was given Sunday off with the hope he’d be ready on Monday. Alfaro is feeling a little sore, and he got an extra day to recover.

• Whether or not Castro is traded, the Marlins anticipate promoting Triple-A New Orleans second-base prospect Isan Diaz in the near future. It could be immediately after the Trade Deadline or in another week or two. If Castro is still with Miami, the Marlins may explore Diaz playing some third base. Diaz is Miami's No. 3 prospect according to MLB Pipeline, and No. 86 in MLB.

“He hasn't [played third] this year,” Hill said. “He did in Spring Training. I think we'll get through Wednesday, and we'll take a step back and see where we are and then move forward.”

• The Marlins promoted three of their top outfield prospects on Monday. Kameron Misner (No. 9), is headed to Class A Clinton; Victor Victor Mesa (No. 13) is jumping to Double-A Jacksonville, and Connor Scott (14th) is joining Class A Advanced Jupiter.