Major League Baseball on ESPN Radio

As previously mentioned, in beginning in the 1998 season, ESPN Radio took over from CBS Radio as the official, national radio broadcaster for Major League Baseball. The network's contract with MLB currently runs through 2028, and as of 2022, Major League Baseball on ESPN Radio is part of ESPN Radio’s main lineup, instead of in an opt-in/opt-out basis as in previous years. However, affiliates retain the ability to opt out of broadcasts involving in-market teams during the regular season.

The games include Opening Day, Sunday Night Baseball, Saturday games (usually the same matchup as the Sunday Night game with case-by-case exceptions, mainly due to start time conflicts), holiday games (during Memorial Day, Independence Day and Labor Day; occasionally broadcast as doubleheaders) and September pennant race games. ESPN Radio holds exclusive radio rights to the All-Star Game and Home Run Derby. The postseason (including the Wild Card Games, Division Series, League Championship Series and World Series) is a semi-exclusive arrangement. The participating teams' flagship stations are allowed to air play-by-play using their own announcers and production. The national ESPN Radio feed may, however, be carried live on another station in those markets as well (for instance, WHB in Kansas City aired the ESPN feed of Kansas City Royals postseason games in 2014 and 2015, competing directly with the Royals Radio Network broadcast on KCSP). If affiliate stations on the teams' radio networks wish to carry coverage of postseason games they must use the national feed. Since the inaugural World Baseball Classic in March 2006, the semi-finals and the championship have also been broadcast as part of Major League Baseball on ESPN Radio. The network also broadcast the MLB at Field of Dreams game in 2021.

In addition to affiliate stations on AM/FM radio, ESPN Radio's game broadcasts are carried as part of Sirius XM Radio's MLB coverage (with Sunday night games also being simulcast on MLB Network Radio). However, they are not included in the subscription "Gameday Audio" package on MLB.com with the exception of the All-Star Game, for which no other radio play-by-play feed is available.

Since June 2011, the games can also be heard online at ESPN Radio.com and on mobile devices via the ESPN app and other applications such as TuneIn. They can also be heard on televisions using connected devices (such as video game consoles) via their respective iHeartRadio and TuneIn apps. Previously, rights restrictions prevented ESPN Radio.com from live-streaming the games. Despite MLB not enforcing blackouts for radio coverage, game coverage on the ESPN mobile app and TuneIn are restricted to listeners in the United States and that are located outside the markets of both teams involved in that broadcast, regardless if said teams are home or away.

As of 2022, the primary ESPN Radio crew for Sunday Night Baseball consists of play-by-play announcer Jon Sciambi and color analyst Doug Glanville. In 2010, Sciambi succeeded Gary Thorne, who had called play-by-play in 2008–09; Thorne had succeeded Dan Shulman, did so from 2002 to 2007; Shulman, in turn, had been preceded by Charley Steiner from 1998 to 2002. Glanville succeeded Chris Singleton, who served as analyst from 2011-2021. Singleton, in turn, succeeded Dave Campbell, who was an analyst from 1999 to 2010. Campbell replaced Kevin Kennedy as analyst in 1999, after the latter had worked with Steiner in the network's inaugural season of coverage. Marc Kestecher currently serves as the network's primary Baseball Tonight studio host, with Jim Basquil or Kevin Winter substituting for him if Kestecher was unavailable due to scheduling conflicts (mainly with his NBA on ESPN Radio play-by-play duties); he was preceded by Joe D'Ambrosio from 1998 to 2007.

For other regular season games (especially Saturday games), different play-by-play announcers are often used with Glanville remaining as analyst. This is mainly due to Sciambi’s unavailability as he is also the play-by-play announcer for Chicago Cubs games televised on the Marquee Sports Network. Backup play-by-play announcers for MLB on ESPN Radio included John Schriffen, Karl Ravech and Roxy Bernstein among others.

Sciambi and Glanville also call the All-Star Game and Home Run Derby each year.

As of 2018, Dan Shulman called the World Series and one of the two League Championship Series with Singleton each year (Jessica Mendoza joined this crew in 2020, while Eduardo Pérez joined in 2021, in place of Singleton, who was co-hosting the pregame and postgame segments with Kevin Winter), while Sciambi calls the other LCS with Mendoza. Various other announcers work the network's secondary regular-season, Wild Card Game and Division Series broadcasts as needed. Starting in the 2023 season, Sciambi will also call the World Series and a League Championship Series, succeeding Shulman in those roles.

For the 2020 season, due to the COVID-19 pandemic, Sciambi and Singleton called each game working remotely, rather than at the ballpark. For the 2020 postseason, they and all of ESPN Radio's announcers called the games from the ESPN studios in Bristol, Connecticut.