Christian Walker, whom the Astros signed with an eye toward an upgrade at first base, says joining Houston was a "no-brainer."

The 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. Walker signed a $60 million, three-year contract that will pay him $20 million annually just more than a week after the Astros acquired infielder Isaac Paredes from Cubs in the trade that sent outfielder Kyle Tucker to Chicago.