I am assuming that by "championships in pro sports", we are referring to the NBA, NFL, NHL and MLB. Since the NFL is the youngster here all of it's teams can be eliminated immediately. In the NBA, Boston has 21 championship appearances winning 17. The Lakers have 31 championship appearances but have only won 15 of those. ( +1 to the winner of the current series). The NHL is dominated by Montreal with 34 championship appearances, winning 24 of those. But the most championship appearances by any pro sports team is 40 by the New York Yankees who have won 27 championships.
In Spain, Real Madrid have won 32 La Liga championships.
In North America, the New York Yankees have won 27 MLB championships and the Montreal Canadiens have won 24 NHL championships.
Kobe Bryant has the Most championships and awards in playing Basketball he plays for the lakers
Bill Russell.
Bitth
professional athlete
Terry Bradshaw when he was with the Pittsburgh Steelers with 4 championships.
Michael Phelps has won 33 medals in the World Championships for his sport, Swimming.
Green bay
Michael Phelps Yogi Berra Bill Russell
the soccerroos
2.
Kobe Bryant
no, it is the participants own choice whether or not they want to become a professional athlete. Most of the time a professional athlete cannot participate in the olympics.
Athlete who does it for a living.