Question: how is Hal Haydel and Rule 5 draft connected?

Context articles: List of 1997 Seattle Mariners draft picks
List of 1999 Seattle Mariners draft picks
Clayton Hamilton (baseball)
Rule 5 draft results
Brian Giles (second baseman)
Hal Haydel
Rule 5 draft
Taylor Duncan
Mike Thomas (baseball)
Ryan Pressly

The following is a list of 1997 Seattle Mariners draft picks.
 The Mariners took part in both the Rule 4 draft (June amateur draft) and the Rule 5 draft.
 The Mariners made 62 selections in the 1997 draft, the first being pitcher Ryan Anderson in the first round.
 In all, the Mariners selected 33 pitchers, 13 outfielders, 5 third basemen, 4 catchers, 4 shortstops, 2 second basemen, and 1 first baseman.
The following is a list of 1999 Seattle Mariners draft picks.
 The Mariners took part in both the Rule 4 draft (June amateur draft) and the Rule 5 draft.
 The Mariners made 52 selections in the 1999 draft, the first being catcher Ryan Christianson in the first round.
 In all, the Mariners selected 29 pitchers, 8 outfielders, 6 shortstops, 3 catchers, 3 first basemen, 2 third basemen, and 1 second baseman.
Clayton Hamilton (born June 15, 1982) an American pitcher for the Yokohama DeNA BayStars.
 From Penn State University, he was selected by the San Diego Padres in the 17th Round (492nd overall) of the 2004 amateur entry draft.
 He was signed by scout Josh Boyd.
 On December 8, 2005, he was sent by the San Diego Padres to the Pittsburgh Pirates as 'player to be named later' in a Nov 21, 2005 trade.
 On December 6, 2007, he was picked up in the Minor League phase of the Rule 5 Draft by the Texas Rangers (baseball).
 Clayton split 2008 between the Bakersfield Blaze and Frisco RoughRiders.
 In 2009, he worked with Frisco and the Oklahoma City RedHawks.
This article contains a list of Rule 5 draft results.
 Players chosen in the Major League Baseball (MLB) phase of the Rule 5 draft have to remain on their new team's 25-man roster for the entire following MLB season, or they are placed on waivers and offered back to their original team if not claimed.
 Players chosen in the Minor League Baseball phases of the Rule 5 draft remain with their new organization without restrictions.
Brian Jeffrey Giles (born April 27, 1960 in Manhattan, Kansas) is a former Major League Baseball player.
 Drafted in the third round of the 1978 Major League Baseball Draft by the New York Mets, Giles reached the major leagues in 1981 and played for the Mets until 1983.
 In 1984, he was drafted by the Milwaukee Brewers in the rule 5 draft.
 He played 34 games with the Brewers in 1985 before signing with the Chicago White Sox as a free agent.
 He played only 9 games for the White Sox, and would not reappear in the Majors until a brief 45-game stint with the Seattle Mariners in 1990.
 He played his last game with the Mariners on July 7, 1990.
 Giles played primarily second base and shortstop.
John Harold "Hal" Haydel (born July 9, 1944, at Houma, Louisiana) is a former Major League Baseball pitcher.
 Haydel signed with the Milwaukee Braves as a free agent in 1962.
 Later that year, he was drafted in the First-Year player draft by the Houston Colt .45s.
 The following year, he was traded along with Dick LeMay and Merritt Ranew to the Chicago Cubs for Dave Gerard and Danny Murphy.
 In 1966, Haydel was selected in the Minor League Draft by the San Francisco Giants.
 Three years later, he was drafted in the Rule 5 draft by the Minnesota Twins.
 During his time with the Twins, Haydel played at the Major League level in 1970 and 1971.
The Rule 5 draft is a Major League Baseball player draft that occurs each year in December, at the annual Winter Meeting of general managers.
 The Rule 5 draft aims to prevent teams from stockpiling too many young players on their minor league affiliate teams when other teams would be willing to have them play in the majors.
 The Rule 5 draft is named for its place in Major League Rules.
 (It is sometimes erroneously referenced with a Roman numeral.)
 The June Rule 4 draft, known as simply "the draft", "amateur draft", or "first year player draft", is a distinctly different process in which teams select high school and college players.
Taylor McDowell "Dunc" Duncan (May 12, 1953 in Memphis, Tennessee – January 3, 2004 in Asheville, North Carolina) was an American baseball infielder.
 Duncan, who was a college teammate of Leon Lee in Sacramento, was selected by the Atlanta Braves as the 10th overall pick of the 1971 Major League Baseball Draft.
 A year later he was traded to the Baltimore Orioles and spent five seasons playing for Orioles-affiliated minor league clubs.
 In September 1977 Duncan was claimed off waivers by the St. Louis Cardinals and made his major league debut, playing a handful of the remaining games.
 In the off-season Duncan changed teams again as the Oakland Athletics selected him in the Rule 5 draft.
 The 1978 season was Duncan's last in Major League Baseball: he appeared in 104 games of the 1978 season playing mostly third base.
 Duncan continued to play in the minor leagues until 1980.
 The obituary of The Sacramento Bee quoted a major league scout who believed that Duncan's career had been hampered by a broken ankle he suffered early in his minor league career.
Mike Thomas (born September 2, 1969) is a former Major League Baseball pitcher.
 Thomas was drafted in the twenty-third round of the 1989 Major League Baseball Draft by the New York Mets.
 In 1991, he was traded along with Ron Darling to the Montreal Expos for Tim Burke.
 Later that year, he was selected in the rule 5 draft by the Cleveland Indians.
 He was returned to the Expos by the Indians the following year.
 In 1993, he signed as a free agent with the Milwaukee Brewers organization.
 He was a member of the team at the Major League level in 1995.
Thomas Ryan Pressly (born December 15, 1988) is an American professional baseball pitcher for the Minnesota Twins of Major League Baseball.
 Originally selected by the Boston Red Sox in the 2007 MLB Draft, the Twins selected Pressly from the Red Sox in the 2012 Rule 5 draft.
 Pressly made his MLB debut on April 4, 2013.