changed the Angels' logo back to a "Big A" with a silver halo over a dark blue baseball diamond. With this logo change, the colors changed to the team's current color scheme: predominantly red with some dark blue and white. When the team's name changed from the "Anaheim Angels" to the "Los Angeles Angels of Anaheim", the logo changed only slightly, the name "ANAHEIM ANGELS" and the blue baseball diamond were removed leaving only the "Big A". For the 2011 season, as part of the 50th anniversary of the Angels franchise, the halo on the 'Big A' logo temporarily changed colors from silver to old gold, paying tribute to the Angels logos of the past (and also the 50th Anniversary tradition of gold). The uniforms also reflected the change to the gold halo for this season. During the 50th Anniversary season the players wore throwback jerseys at each Friday home game reflecting all the different logos and uniforms previously worn by players. Also, Angels alumni from past seasons threw the ceremonious first pitch at every home game during the 50th Anniversary season. A new patch was added on the uniforms before the 2012 season, featuring a red circle encircling the words "Angels Baseball" and the club logo inside and flanking the year 1961 in the middle, which was the year the Angels franchise was established. With this new patch, the Angels' A with the halo now appears on three different locations of the jersey: the right shoulder, the wordmark, and the left shoulder. Rivalries The Angels have historically developed rivalries with other AL West members: the Oakland Athletics, Seattle Mariners, Texas Rangers, and, to a lesser extent, the Houston Astros, who joined the division in 2013. The Angels were also considered rivals of the New York Yankees and the Boston Red Sox due to a total of seven postseason series against the two teams in the 2000s. The Los Angeles Dodgers are considered a geographical rival as the two teams share the Greater Los Angeles television market. Seattle Mariners The Angels have played the Seattle Mariners several times per season since the latter's founding and entry into the AL West division in 1977. On April 11, 1990, newly-signed Angels starting pitcher Mark Langston and reliever Mike Witt threw a combined no-hitter against Seattle. The game was Langston's Angels debut and his first against his former team. In early August of