Question: Which center for the San Antonio Spurs in the National Basketball Association (NBA) averaged 25.6 points, 13.0 rebounds, and 3.9 blocks per game?

Context paragraphs:
Pete Tillotson: Peter S. Tillotson (born March 23, 1936) is an American former basketball player.  He grew up in Ludington, Michigan, and played basketball for Ludington High School from 1951 to 1954.  In three years at Ludington High, he scored 1,176 points -- 179 points as a sophomore, 433 points as a junior and 564 points as a senior.  During the 1953–54 season, he averaged 25.6 points per game.  He led Ludington to a 21–2 record and the state finals in 1952 and an 18–4 record in 1953.  As a student at the University of Michigan, he played center for the Michigan Wolverines men's basketball team from 1955 to 1958.  He was the captain, most valuable player, and leading scorer on the 1957–58 Michigan Wolverines men's basketball team.  He scored 415 points during the 1957–58 season (an average of 18.8 points per game), the second highest point total in Michigan's history to that point.  Tillotson was drafted by the Syracuse Nationals in the fifth round (53rd overall pick) of the 1958 NBA draft.  He was injured during the pre-season training camp for Syracuse and spent the 1958–59 season playing for the Milan Simmenthal in the Italian Amateur League.  He led Milan to a second-place finish for the European championship while averaging 18 points and 11 rebounds.  He played for Syracuse in 1960, but his playing career ended after he sustained a knee injury.  After retiring from basketball, Tillotson worked for nearly 40 years for Ford Motor Company, Paine Webber, Goldman Sachs and General Electric.  He retired in 2001.  He was included in the inaugural class of seven athletes inducted into the Mason County Sports Hall of Fame in 2005.

Willie Williams (basketball): Willie Earl Williams (born July 28, 1946) is a former National Basketball Association (NBA) player.  Williams lettered two years in basketball at Florida State University after two years at Miami Dade Community College.  In the 1968-69 season, Williams averaged 7.8 points and 9.6 rebounds per game.  The following season, Williams averaged 16.9 points and 11.0 rebounds per game.  He was drafted with the fourth pick in the third round of the 1970 NBA Draft.  After playing sixteen games with the Celtics in the 1970-71 NBA season, Williams was waived by the Celtics and then claimed off waivers by the Cincinnati Royals.  In his one NBA season, Williams averaged 0.9 points and 0.9 rebounds per game.

Frank Kudelka: Frank Carl Kudelka (June 25, 1925 - May 4, 1993), nicknamed Apples, was an American National Basketball Association (NBA) player.  In his first two years at Saint Mary's College of California, Kudelka averaged 18.1 points per game.  Once the shotclock was introduced to college basketball in his junior season, Frank averaged 20.4 points per game.  He was the nation's fourth leading scorer.  As a senior at Saint Mary's, Frank averaged 16.2 points per game.  He was also named an All-American basketball player by the Helms Foundation after his senior season.  Frank made his NBA debut in the 1949-50 NBA season for the Chicago Stags.  In his first NBA season, Frank averaged 6.7 points and 2.0 assists per game.  Frank played four seasons in the NBA with the Stags, Washington Capitols, Boston Celtics, Baltimore Bullets and Philadelphia Warriors.  In his NBA career, Frank averaged 7.2 points, 3.2 rebounds, and 2.1 assists per game.

David Robinson (basketball): David Maurice Robinson (born August 6, 1965) is an American former professional basketball player, who played center for the San Antonio Spurs in the National Basketball Association (NBA) for his entire career.  Based on his prior service as an officer in the United States Navy, Robinson earned the nickname "The Admiral".

Ángel Daniel Vassallo: Ángel Daniel Vassallo Colón (born April 21, 1986) is a Puerto Rican professional basketball player.  After completing his high school education, he played for the Tigers of Hargrave Military Academy, reaching the preparatory national finals.  Vassallo joined the National Collegiate Athletic Association playing for Virginia Tech.  Throughout his college career, Vassallo received several recognitions, including two All-ACC second team inclusions.  He finished fifth in the campus' all-time scoring list.  In his first Baloncesto Superior Nacional season, Vassallo averaged 25.6 points, 6.7 rebounds, and 4.3 assists per game for the Criollos de Caguas.  He made his LNB debut for Paris-Levallois Basket, leading the team to the playoffs.  Vassallo has been an All-Star player in both the BSN and LNB.

Danny Green (basketball): Daniel Richard "Danny" Green, Jr. (born June 22, 1987) is an American professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  He was a swingman from the University of North Carolina, where he played in more games (145) and had more wins (123) than any Tar Heel before him.  Green is also the only player in the history of the Atlantic Coast Conference (ACC) with at least 1,000 points, 500 rebounds, 250 assists, 150 three-pointers, 150 blocks and 150 steals.  He won an NCAA championship his senior year and was subsequently drafted by the Cleveland Cavaliers with the 46th overall pick in the 2009 NBA draft.  During the 2013 NBA Finals, Green set an NBA record for most three-point field goals made in a Finals series.  He then won an NBA championship with the San Antonio Spurs the following season, and became just the third player from UNC to win an NCAA championship and an NBA championship, the two others being James Worthy, and Michael Jordan.  Known for his perimeter defense and three-point shooting, Green has been a key contributor on both ends on the floor throughout his NBA career, having been selected to his first NBA All-Defensive Second Team in the 2016-17 NBA season.

George Gervin: George Gervin (born April 27, 1952), nicknamed "The Iceman", is an American retired professional basketball player who played in both the American Basketball Association (ABA) and National Basketball Association (NBA) for the Virginia Squires, San Antonio Spurs, and Chicago Bulls.  Gervin averaged at least 14 points per game in all 14 of his ABA and NBA seasons, and finished with an NBA career average of 26.2 points per game.  Gervin is widely regarded to be one of the greatest shooting guards in NBA history.

1989–90 Houston Rockets season: The 1989–90 NBA season was the Rockets' 23rd season in the National Basketball Association, and 19th season in the city of Houston.  After a 9–6 start to the season, the Rockets would struggle posting a 12–18 record as they entered the New Year.  However, they would manage to win seven of their next nine games.  At midseason, the Rockets acquired Vernon Maxwell from the San Antonio Spurs as they continued to play .500 basketball for the rest of the season.  They finished fifth in the Midwest Division with a 41–41 record, winning a tie-breaker over the Seattle SuperSonics for the #8 seed in the Western Conference.  Akeem Olajuwon led the Rockets with 24.3 points, 14.0 rebounds and 3.9 blocks per game, while being selected for the 1990 NBA All-Star Game.  However, in the first round of the playoffs, they lost to the Los Angeles Lakers in four games.

1990–91 San Antonio Spurs season: The 1990–91 NBA season was the Spurs' 15th season in the National Basketball Association, and 24th season as a franchise.  After a promising rookie season from second-year star David Robinson, the Spurs would win 17 of their first 22 games on their way to a 30–10 start.  However, with Terry Cummings and Rod Strickland lost for long stretched games due to injuries, the Spurs struggled in February with a 4–7 record.  The Spurs would bounce back winning 13 of their final 17 games as they won the Midwest Division with a solid 55–27 record.  Robinson averaged 25.6 points, 13.0 rebounds, and 3.9 blocks per game while being selected to the All-NBA First Team, All-Defensive Second Team, and for the 1991 NBA All-Star Game.  However, in the first round of the playoffs, the Spurs would be stunned by the 7th-seeded Golden State Warriors in four games after winning Game 1.

Darrun Hilliard: Darrun Hilliard II (born April 13, 1993) is an American professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA), on a two-way contract with the Spurs' NBA G League affiliate, the Austin Spurs.  He attended Liberty High School in Bethlehem, Pennsylvania, where he was a two-time "Associated Press" first-team selection.  As a senior in high school, he averaged 19.7 points per game.  Hilliard committed to play college basketball for the Villanova Wildcats and coach Jay Wright.  He showed steady improvement every year, going from 4.8 points per game as a freshman to 14.3 points per game as a senior as he helped Villanova reach the NCAA Tournament in three straight seasons.  As a senior, he was named to the first-team All-Big East and was honored as Big 5 Player of the Year.

Supporting paragraphs: 1990–91 San Antonio Spurs season David Robinson (basketball)
Answer: David Robinson