The Houston Astros welcomed first baseman Christian Walker to the team Monday, in one of two moves that almost certainly marks the end of Alex Bregman's time in Houston. But Bregman's tenure didn't end without a concentrated effort by the Astros to keep the two-time All-Star.

On a day when Walker signed a three-year, $60 million contract that will pay him $20 million annually, which came just more than a week after the Astros acquired infielder Isaac Paredes from Cubs in the trade that sent outfielder Kyle Tucker to Chicago, the talk around the Astros seemed to focus more on who won't be back next season.

"The way I view it right now is Paredes is going to play third base and Walker is going to play first base," Astros general manager Dana Brown said Monday in Houston. "And Bregman's still a free agent."

The Astros had hoped to re-sign Bregman, the team's third baseman for the past nine seasons, but Brown said the negotiations stalled.

"I thought we made a really competitive offer, showing that we wanted him back," he said. "But we had to pursue other options. We couldn't just sit there. We locked in Paredes early in that trade, knowing that he could play third or first and then when the opportunity to add another bat came up, we just jumped on it."

Adding a first baseman was an offseason priority for the Astros after they released struggling first baseman Jose Abreu less than halfway through a three-year, $58.5 million contract.

"We knew we had to get better at first base," Brown said. "We pursued [Walker] and we're excited to have him because we know that we're going to have a really good first baseman that can defend and also hit the ball on the seats from time to time."

Walker was attracted by the sustained success of the Astros, who won their first two World Series titles in 2017 and 2022.

"I've been watching this team for a while now, and that edge, the energy, the expectation, you can tell that they're going out there with a standard," he said. "And I'm very excited to be a part of it."

Walker is looking forward to playing with star second baseman Jose Altuve. Walker is fascinated by the success and consistency Altuve has had over his 14-year career.

"I get a chance to learn from Jose Altuve," Walker said. "Nothing really gets better than that."

Brown was asked what he would tell Astros fans, who saw the club lose another star after George Springer and Carlos Correa left as free agents in recent years.

"I would just tell the fans that look, we are very focused on remaining competitive," he said. "We're very focused on the winning division and going back to the World Series, and I think with these additions that we have the ability to do that. So, I feel strongly that we're going to be picked to win the division first off. And if our pitching holds up, which I feel strongly about, as well, I think we'll get deep into the postseason."

The Astros won the American League West for a fourth straight year this season before they were swept by the Tigers in an AL Wild Card Series.

Walker, 33, hit .251 with 26 homers, 84 RBIs, 55 walks and 133 strikeouts this year. In 2023, he batted .258 with 33 homers and 103 RBIs as the Diamondbacks reached the World Series.

Walker played in 130 games this year, down from 157 in 2023 and 160 in 2022. He was sidelined between July 29 and Sept. 3 because of a strained left oblique.

He spent the past eight seasons with the Diamondbacks, hitting .251 with 146 homers and 442 RBIs.

He didn't secure a full-time job in the big leagues until 2019. He has provided consistent power over the past six seasons and grown into an elite defensive first baseman, winning Gold Gloves in each of the past three seasons.

Walker played college ball at South Carolina and was drafted by the Baltimore Orioles in 2012. He made his big league debut with the Orioles in 2014 but couldn't stick in the majors and was claimed off waivers by Atlanta, Cincinnati and Arizona in a five-week span.

Walker's contract has a limited no-trade provision, allowing him to block deals to six teams without his consent. He would earn $200,000 for winning an MVP, $175,000 for finishing second in the voting, $150,000 for third, $125,000 for fourth and $100,000 for fifth.

Walker also would get $100,000 for being named World Series MVP, $50,000 for League Championship Series MVP and $75,000 apiece for making the All-Star Game or winning a Gold Glove or Silver Slugger Award.

Infielder Grae Kessinger was designated for assignment to open a roster spot.

The Associated Press contributed to this report.