1988 ... the Orioles lost an MLB record 21 consecutive games to start the season.
Orioles
Cal Ripken Jr. played in 2632 consecutive games for the Baltimore Orioles from May 30, 1982 to September 20, 1998.
Cal Ripken Jr.
The ovation for Cal Ripken Jr of the Baltimore Orioles, when he broke Lou Gehrig's record for most consecutive games at 2,131, lasted for 22 minutes and 15 seconds.
Check out the 'Consecutive Games Played Streaks' link on this page to see the 15 longest consecutive games played streaks in MLB history.
Vinny testaverde
The most consecutive wins to start a season is 13 by the 1982 Atlanta Braves and 1987 Milwaukee Brewers.
The Boston Red Sox have sold out the most consecutive games in MLB history while the Portland Trailblazers have sold out the most consecutive home games in the NBA (and in North America for any sport).
The 1988 Orioles started with 21 consecutive losses, which I believe is the modern record.
The Boston Red Sox hold the record with 615 consecutive sellouts as of August 14, 2010.
On September 6, 1995, Baltimore Orioles shortstop Cal Ripken, Jr. played in his 2,132nd consecutive game, breaking Lou Gehrig's 56-year old record. Ripken would go on to play in 2,632 straight games.