Question: Thursday Night Baseball includes a play-by-play announcer who has been on NBC Sports since what time period?

full_context: Document 1: Bob McCown: Robert Alan "Bob" McCown (born May 21, 1952 in Columbus, Ohio) is an American radio personality who hosts the Canadian sports talk show of a late afternoon/early evening radio talk show called "Prime Time Sports". The program is broadcast from the Toronto-based studio of the Fan 590 (the flagship radio station of the Fan Radio Network) and is syndicated nationally in Canada. Since 2004, this radio talk show has also been simulcast on television on Rogers Sportsnet. Since 2009, the show's live stream has been available online in Canada on the FAN590 website.
Document 2: Baseball IQ: Baseball IQ is an American television game show airing on the cable channel MLB Network. The show debuted on January 24, 2012 and its first season is scheduled to end on February 23, 2012 with the season championship. The show is hosted by MLB Network anchor Matt Vasgersian. The show's focus is baseball trivia.
Document 3: James Brown (sportscaster): James Brown (born February 25, 1951), commonly called "J.B.", is an American sportscaster known for being the host of "The NFL Today" on CBS Sports and "Thursday Night Football" on CBS Sports and NFL Network. He is also the Special Correspondent for CBS' news division. Also, he is best known as the former host of the FOX network's NFL pregame show, "Fox NFL Sunday" for 11 years.
Document 4: ESPN College Football Thursday Primetime: ESPN College Football Primetime is a live game presentation of Division 1-A college football on ESPN. In the past, the presenting sponsor was Cooper Tires, but since the 2006 season, the current presenting sponsor is Applebee's. The game telecast airs every Thursday night at 7:45pm ET during the college football regular season. The game is preceded by a 30-minute segment with Adnan Virk, Joey Galloway and Jesse Palmer, all of whom also appear on the halftime report. This game telecast is also presented in high definition on ESPNHD.
Document 5: Bob Murphy (sportscaster): Robert Allan Murphy (September 19, 1924 – August 3, 2004) was an American sportscaster who spent 50 years doing play-by-play of Major League Baseball games on television and radio. The Oklahoman was best known for announcing the New York Mets, from their inception in 1962 until his retirement in 2003. He was honored by the Baseball Hall of Fame with the Ford C. Frick Award in 1994.
Document 6: Matt Vasgersian: Matthew Edward "Matt" Vasgersian (born September 28, 1967) is an American sportscaster and television host. Vasgersian is currently a play-by-play announcer for Fox Sports' coverage of Major League Baseball, as well as a studio host for the MLB Network. In the past he has served as an announcer for Fox Sports' National Football League coverage, NBC Sports' coverage of the Olympic Games, and NBC Sports' coverage of the short lived XFL. He formerly called play-by-play for the Milwaukee Brewers and the San Diego Padres.
Document 7: List of Major League Baseball on Fox broadcasters: Matt Vasgersian was a regular announcer. Dick Stockton and Josh Lewin were also regular fill in announcers. Leo Mazzone was as a fill in color commentator.
Document 8: Bob Costas: Robert Quinlan Costas (born March 22, 1952) is an American sportscaster, on the air for NBC Sports television since the early 1980s. He was the prime-time host of 12 Olympic Games, from 1992 until 2016. Costas currently does play-by-play for MLB Network and hosts an interview show called "Studio 42 with Bob Costas".
Document 9: NBA Showtime: NBA Showtime is the pregame show aired before each "NBA on NBC" telecast. The program, a half-hour in length, began during the 1990–91 NBA season, and was initially hosted by Bob Costas. Costas left in the mid-1990s, and became lead play-by-play voice of "The NBA on NBC" in 1997. Hannah Storm replaced Costas and hosted "Showtime" until Ahmad Rashād replaced her as host of the pregame show when Storm went on maternity leave in 2001. Storm returned in 2002 which meant that her and Rashad would alternate as hosts throughout the season. NBC kept the title of "Showtime" prior to the 2000–01 NBA season.
Document 10: Chris Berman: Christopher James Berman (born May 10, 1955), nicknamed Boomer, is an American sportscaster. He has been an anchor for "SportsCenter" on ESPN since 1979, joining a month after its initial launch, and hosted the network's "Sunday NFL Countdown" program from 1985 to 2016. He has also anchored "Monday Night Countdown", U.S. Open golf, the Stanley Cup Finals, and other programming on ESPN and ABC Sports. Berman calls play-by-play of select Major League Baseball games for ESPN, which included the Home Run Derby until 2016. A six-time honoree of the National Sports Media Association's "National Sportscaster of the Year" award, Berman was instrumental in establishing ESPN's lasting popularity during the network's formative years. He is well known for his various catchphrases and quirky demeanor. In January 2017, it was announced that Berman would be stepping down from several NFL-related roles at ESPN, but would be remaining at the company.
Document 11: Dick Enberg: Richard Alan Enberg (born January 9, 1935) is a retired American sportscaster. He provided play-by-play for various sports on numerous radio and television networks (including NBC, CBS, and ESPN), and for individual teams, over the course of an approximately 60-year career.
Document 12: Monday Night Baseball: Monday Night Baseball is a live game telecast of Major League Baseball that airs most Monday nights during the regular season on ESPN. The official name of the game is "Monday Night Baseball presented by USAA". The game starts at 7 p.m. ET, following "SportsCenter", and usually lasts around three hours leading up to an hour-long "Baseball Tonight". The program sometimes airs on ESPN2 rather than ESPN, often due to NBA playoff coverage in April and May, and preseason Monday Night Football coverage in August.
Document 13: Major League Baseball on TSN: Major League Baseball on TSN is a television presentation of Major League Baseball games on Canada's TSN (The Sports Network). TSN has broadcast Major League Baseball games since they went on the air in 1984. Their current MLB schedule consists of simulcasting ESPN's "Sunday Night Baseball" broadcasts on TSN2. TSN had previously broadcast "Sunday Night Baseball" from 1990-2000. TSN has also broadcast Toronto Blue Jays (1984-2009) and Montreal Expos (1985-1999; 2001) games.
Document 14: Thursday Night Baseball: Thursday Night Baseball (formally known as MLB Network Showcase) is the title of a presentation of Major League Baseball on cable and satellite channel MLB Network (self-produced by MLB Network), that premiered on April 9, 2009. Longtime NBC Sports broadcaster Bob Costas is one of the play-by-play voices of the broadcasts. Matt Vasgersian also does play-by-play on some games. Jim Kaat, John Smoltz, and Tom Verducci provide color commentary. The network produces 26 non-exclusive live games a year during baseball season. Since one or both teams' local TV rights holders also carry the games, the MLB Network feed is subject to local blackouts. In that event, the cities in the blacked-out markets will instead see a simulcast of another scheduled game via one team's local TV rights holder.
Document 15: TNT Sunday Night Football results (1990–1997): This is a list of results of National Football League games played on Turner Network Television (TNT). From 1990–1997, TNT broadcast NFL games on Sunday nights for the first half of the regular season (or nine games a year). Meanwhile, ESPN would pick things up for the second half of the season. TNT also got a couple of Thursday night games to show, which were aired in place of Sunday night games (that would have otherwise conflicted with the World Series; coincidentally, the , , , and editions of the World Series featured the Turner-owned Atlanta Braves). Following the 1997 season, ESPN would broadcast Sunday night NFL games for the whole season. This particular arrangement between ESPN and the National Football League would continue until the end of the 2005 season. Since that time, NBC (who last broadcast NFL games the same year that TNT last broadcast them, 1997) has been the television home of Sunday night games. Meanwhile, ESPN has replaced as the broadcaster of Monday night games.
ground_truth: early 1980s