Robot umpires will get some more warm-up time.

Major League Baseball and the Atlantic League said Wednesday that the experiment with radar-tracking technology to call balls and strikes won't be used when the independent minor-league starts play April 25. Instead, the technology "will be implemented gradually over the course of the 2019 season." No date for the start was announced.

Plate umpires will wear earpieces and be informed of ball and strike calls by a TrackMan computer system that uses Doppler radar. Umps will have the ability to override the computer.

A test to extend the distance between the pitching rubber and home plate by 2 feet to 62 feet also was pushed back. Originally scheduled to start after this year's All-Star break, the distance change was put off until the second half of 2020.

Most valuable teams

Forbes estimates the New York Yankees are baseball's most valuable franchise at $4.6 billion, up 15 percent from its figure last year.

The Los Angeles Dodgers are second at $3.3 billion, followed by the World Series champion Boston Red Sox at $3.2 billion, the Chicago Cubs ($3.1 billion), San Francisco Giants ($3 billion) and the New York Mets ($2.3 billion).

The Yankees' YES Network broadcasts Forbes "SportsMoney" television show.

Forbes' franchise values list released Wednesday estimates Miami is the least valuable team at $1 billion, just behind Tampa Bay ($1.01 billion).

Carpenter has deal

Three-time All-Star infielder Matt Carpenter and the St. Louis Cardinals have agreed to a contract for 2020 and '21, a deal that includes an option for 2022 that could become guaranteed.

The 33-year-old has a $14.5 million salary this season a part of a $52 million, six-year deal that included an $18.5 million club option for 2020 with a $2 million buyout.

He has a .273 batting average with 134 home runs and a .376 on base percentage in 1,031 games since debuting in 2011 with the Cardinals. Carpenter was an All-Star in 2013, 2014, and 2016. He finished among the top 10 in MVP voting in 2013 and last year.

Markakis home looted

Atlanta police are investigating the burglary of Braves outfielder Nick Markakis' home and say $20,000, five guns and other items were stolen while the team was on a road trip.

Officers responded to an alarm at Markakis' home on March 29 and arrived to find the front door window broken and the door open.

A master bedroom safe containing the cash, an AR-15 rifle, three handguns and a watch was taken from the home. The burglary occurred when the Braves were in Philadelphia for their season-opening series.

Around the bases

Los Angeles Angels star outfielder Mike Trout is day-to-day after straining his right groin during Tuesday night's game against the Milwaukee Brewers. ... The Chicago Cubs put left-hander Jon Lester (hamstring) on the 10-day injured list and recalled left reliever Tim Collin from Triple-A Iowa. ... The team debut of Chicago White Sox outfielder Jon Jay remains on hold because of a right hip strain and related groin soreness.