Question: Referee Hue Hollins was probed by the FBI over the 2007 NBA betting scandal involving a former referee that officiated how many regular season games during his career?

Context paragraphs:
2007 NBA betting scandal: The 2007 NBA betting scandal was a scandal involving the National Basketball Association (NBA) and accusations that an NBA referee used his knowledge of relationships between referees, coaches, players and owners to bet on professional basketball games.  In July 2007, reports of an investigation by the Federal Bureau of Investigation (FBI) were made public, which alleged that during the 2005–06 and 2006–07 NBA seasons, referee Tim Donaghy bet on games in which he officiated.

Ron Garretson: Ron Garretson (born July 1, 1958 in Long Beach, California) is an American professional basketball referee for the National Basketball Association (NBA).  In his 20+ NBA seasons, since 1987, he has officiated over 1,600 games, including 1,397 regular season NBA games, 157 playoff games and 11 Finals games.  He also officiated the 1993 Europe Tour in London and the 1997 and 2013 NBA All-Star Games.  He is the son of former NBA referee Darell Garretson, who died in April 2008 at the age of 76.

Bob Delaney (basketball referee): Bob Delaney (born November 1, 1951 in Paterson, New Jersey) is a former police officer and professional basketball referee in the National Basketball Association (NBA) who officiated from the 1987-88 NBA season up until the 2010-11 NBA season.  Beginning the 2006-07 NBA season, Delaney had officiated in 1,182 regular season games, 120 playoff games, and seven NBA Finals games.  In addition, Delaney was assigned to the 1998 NBA All-Star Game.  He wore the uniform number 26.

Monty McCutchen: Monty McCutchen (born February 14, 1966) is a professional basketball referee who has worked in the National Basketball Association (NBA) since the 1993-1994 season.  Now in his 21st year as a referee, McCutchen has officiated 1,181 regular season, 97 playoff, and nine NBA Finals games (detailed below) over the past five seasons.  Along with Mike "Duke" Callahan and Sean Corbin, McCutchen was also one of the three officials for the 2007 NBA All-Star Game.  He is a full-time crew chief who wears the uniform number 13.

Tim Donaghy: Tim Donaghy ( ; born January 7, 1967) is a former professional basketball referee who worked in the National Basketball Association (NBA) for 13 seasons from 1994 to 2007.  During his career in the NBA, Donaghy officiated in 772 regular season games and 20 playoff games.

Tommy Nuñez: Tommy Núñez is the founder of the Tommy Núñez foundation and a former NBA referee.  He is the father of former NBA referee Tommy Núñez, Jr..  He was born on September 10, 1938 in Santa Maria, California.  According to Tim Donaghy during the aftermath of his 2007 NBA betting scandal, he claimed that during the 2007 NBA Playoffs in the Western Conference Semi-finals match between the Phoenix Suns and eventual NBA Finals champion San Antonio Spurs, Nuñez had a major influence on changing the outcome in that particular series, with him having a major disliking for Suns owner Robert Sarver and enjoying the lifestyle in San Antonio and having that series be poorly officiated from the very start until the bitter end of it.

Hue Hollins: Hue Spencer Hollins, Sr. (November 28, 1940 - July 4, 2013)  was an American professional basketball referee for the National Basketball Association (NBA).  During his 27-year career in the NBA, Hollins officiated 19 NBA Finals games and five NBA All-Star Games.  He is notable for working the Finals every year during the 1990s and for a notorious call during a 1994 NBA Playoffs game between the Chicago Bulls and New York Knicks.  Hollins was probed by the Federal Bureau of Investigation (FBI) over the 2007 NBA betting scandal involving former referee Tim Donaghy.

Brad Watson (ice hockey): Brad Watson (born on October 4, 1961 in Regina, Saskatchewan) is a National Hockey League referee, who wears uniform number 23.  As of the end of the 2007–08 NHL season, he has officiated 542 regular season games, his first on March 7, 1996 and 62 playoff games, his first on April 13, 2000.  He officiated on December 8, 2009 when Martin Brodeur tied Terry Sawchuk's career shutout record with his 103rd shutout.  He has officiated the 2003, 2004, 2006, 2007, 2008, 2012, 2013, and 2014 Stanley Cup finals.

Personal Foul (book): Personal Foul: A First-Person Account of the Scandal That Rocked the NBA is an autobiography written by former National Basketball Association (NBA) referee Tim Donaghy and published by Florida-based VTi-Group, Inc. in December, 2009.  Donaghy, who had resigned from the league as a central figure in the 2007 NBA betting scandal, describes his involvement in and inner workings of the scandal, as well as his gambling addiction.

Steve Javie: Steve Javie (born January 17, 1955) is an American retired professional basketball referee who refereed in the National Basketball Association (NBA) from the 1986–87 NBA season to the 2010–11 season.  As of the beginning of the 2006–07 NBA season, Javie has officiated 1,264 regular season, 190 playoff, and 18 NBA Finals games.  According to "Referee" magazine, Javie was a highly regarded referee in the NBA, and he was respected within the officiating community for his game management skills.  He was also notable during his NBA officiating career for his quickness in assessing technical fouls.

Supporting paragraphs: Hue Hollins Tim Donaghy
Answer: 772