He's putting his season and, to a lesser extent, his career in jeopordy. What level of jeopordy is debatable. It could be minimal, but there's definitely a risk involved and it includes the Giants success.
I'm not sure how I feel about it. I'm not against it but I'm a little concerned. And of course if he struggles at the start of the season, we'll never hear the end of it all being the WBC's fault.