Question: when is the American former Major League Baseball (MLB) outfielder and manager who also replaced Manager Cal Ripken, Sr when fired born

Context paragraphs:
1988 Baltimore Orioles season: The 1988 Baltimore Orioles season was a season in American baseball.  It involved the Orioles finishing 7th in the American League East with a record of 54 wins and 107 losses.  The season is remembered for the 0-21 start that lasted from April 4 to 28 to start the Orioles season.  Manager Cal Ripken, Sr. was fired after an 0-6 start and replaced by Hall of Famer Frank Robinson.  The Orioles won their first game of the year against the Chicago White Sox at Comiskey Park on April 29.  The most runs allowed during the season was 15 in a game on June 19 while the most runs scored was 12 in a game on May 31.  Orioles owner Edward Bennett Williams died in August of that year.

2001 Major League Baseball All-Star Game: The 2001 Major League Baseball All-Star Game was the 72nd playing of the midsummer classic between the all-stars of the American League (AL) and National League (NL), the two leagues comprising Major League Baseball.  The game was held on July 10, 2001 at Safeco Field in Seattle, Washington, home of the Seattle Mariners of the American League.  The American League defeated the National League, 4–1.  This was Cal Ripken, Jr.'s 19th and final All-Star Game.  It was also the final All-Star Game for San Diego Padres legendary right fielder Tony Gwynn.

Frank Robinson: Frank Robinson (born August 31, 1935) is an American former Major League Baseball (MLB) outfielder and manager.  He played for five teams from 1956 to 1976, and became the only player to win league MVP honors in both the National and American Leagues.  He won the Triple Crown, was a member of two teams that won the World Series (the 1966 and 1970 Baltimore Orioles), and amassed the fourth-most career home runs at the time of his retirement (he is currently 10th).  Robinson was elected to the Baseball Hall of Fame in 1982.

Mark Belanger: Mark Henry Belanger (June 8, 1944 – October 6, 1998), nicknamed "The Blade", was an American professional baseball shortstop.  He played eighteen seasons in Major League Baseball (MLB) for the Baltimore Orioles and Los Angeles Dodgers.  A defensive standout, he won eight Gold Glove Awards between 1969 and 1978, leading the American League in assists and fielding percentage three times each, and retired with the highest career fielding average by an AL shortstop (.977).  He set franchise records for career games, assists and double plays as a shortstop, all of which were later broken by Cal Ripken Jr. After his playing career, he became an official with the Major League Baseball Players Association.

Ryan Minor: Ryan Dale Minor (born January 5, 1974) is an American former professional baseball third baseman and college basketball player.  He played all or part of four seasons in Major League Baseball, from 1998 to 2001, with the Baltimore Orioles and Montreal Expos.  He is currently the Manager of the Delmarva Shorebirds, and a former manager of the Frederick Keys, both Orioles minor league affiliates.  He is known for replacing Cal Ripken, Jr., when Ripken ended his consecutive games played streak on September 20, 1998.

Rubén Amaro Jr.: Rubén Amaro Jr. (born February 12, 1965) is an American former professional baseball player and General Manager who is the first base coach of the Boston Red Sox of Major League Baseball, as of the 2016 season.  It is his first coaching job.  He played in Major League Baseball as an outfielder from 1991 to 1998.  Amaro was named the General Manager of the Philadelphia Phillies on November 3, 2008, succeeding Pat Gillick and remained in that position until September 10, 2015.  He is the son of the late former Major League Baseball player Rubén Amaro Sr.

Cal Ripken's Real Baseball: Cal Ripken's Real Baseball, also known as Real Baseball Online or Ultimate Baseball Online, was the first free-to-play baseball based massively multiplayer online sports game (MMOSG).  Operating from 2003 until 2008, the game was developed and published by Netamin Communication Corporation.  The game was designed to allow 18 human-controlled players to compete simultaneously in virtual game, though the number was later reduced due to lag issues.  Former Major League Baseball player Darrell Evans served as the game's spokesperson/ambassador prior to Cal Ripken's endorsement of the game.  After it ceased operation in 2008, a fan-led open source project was attempted before Real Baseball's successor, Big League Online, was released for beta testing in early 2011.

Brett Cecil: Brett Aarion Cecil (born July 2, 1986) is an American professional baseball pitcher for the St. Louis Cardinals of Major League Baseball (MLB).  He previously played for the Toronto Blue Jays.  Cecil was drafted as the 38th overall pick in the 2007 MLB draft by the Blue Jays.  He pitched for DeMatha Catholic High School and the Maryland Terrapins of the University of Maryland, College Park.  In the summer of 2005 he pitched for the Silver Spring-Takoma Thunderbolts in the Cal Ripken Collegiate Baseball League and threw the first and only no-hitter by a single pitcher in League history.

Dave Skaggs: David Lindsey Skaggs (born June 12, 1951) is an American former Major League Baseball catcher.  He played all or part of four seasons, from until , for the Baltimore Orioles and California Angels.  As a member of the Orioles, he was the last Oriole to wear #8 before Cal Ripken, Jr.

Billy Ripken: William Oliver Ripken (born December 16, 1964), nicknamed Billy The Kid, is an American former infielder in Major League Baseball from 1987 –1998 for the Baltimore Orioles (1987–92, '96), Texas Rangers (1993–94, '97), Cleveland Indians (1995), and Detroit Tigers (1998).  He is 6 ft tall and weighs 180 lb .  During his career, he batted and threw right-handed.  He is the younger brother of Hall of Famer Cal Ripken, Jr..  He currently serves as a radio host for XM Satellite Radio and a studio analyst for MLB Network.

Supporting paragraphs: 1988 Baltimore Orioles season Frank Robinson
Answer: August 31, 1935