![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/16/00/22/3671208/4/rawImage.jpg)
Huge turnout for Giants parade up Market
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/66/24/00/14237744/16/rawImage.jpg)
Giants' Matt Cain announces he expects to retire after Saturday start
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/31/05/57/6577124/12/1200x0.jpg)
Matt Cain makes startling revelation about his pitching arm
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/31/41/05/6689125/4/ratio3x2_700.jpg)
Matt Cain makes startling revelation about his pitching arm
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/16/00/54/3672843/4/rawImage.jpg)
Huge turnout for Giants parade up Market
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/17/76/55/4189028/4/rawImage.jpg)
Matt Cain makes startling revelation about his pitching arm
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/65/46/70/14052884/8/rawImage.jpg)
Giants' Matt Cain announces he expects to retire after Saturday start
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/66/24/03/14237908/14/rawImage.jpg)
Giants' Matt Cain announces he expects to retire after Saturday start
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/30/53/15/6468468/6/ratio3x2_700.jpg)
Matt Cain makes startling revelation about his pitching arm
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/66/24/00/14237746/17/rawImage.jpg)
Giants' Matt Cain announces he expects to retire after Saturday start
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/16/00/41/3672169/4/rawImage.jpg)
Huge turnout for Giants parade up Market
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/66/24/03/14237910/14/rawImage.jpg)
Giants' Matt Cain announces he expects to retire after Saturday start
![SFGATE - Giants pitcher Matt Cain, wife Chelsea and daughter Hartley wave during the World Series victory parade on Wednesday, October 31, 2012 in San Francisco, Calif. (Beck Diefenbach/Special to the Chronicle)](https://s.hdnux.com/photos/16/00/30/3671598/5/rawImage.jpg)
Huge turnout for Giants parade up Market