Ryan Dempster has had to wait an entire week between his last start of the spring until tonight’s season and Red Sox debut. Despite being a veteran of what is now 16 seasons, the 35-year-old right-hander confessed to some anxiety about the wait. His anxiety, mixed with the curiosity of everyone to see how his skills translate to the AL East, make the start feel, simply, big. “You get that anxious feeling you want the season to start. It started on Monday but for me it starts (tonight),” said Dempster. “I’m just looking forward to going out there and getting that first one out of the way.” Dempster performed nicely in spring training, posting a 3.74 ERA. His first three starts were sharper than the last three, as his walks increased from none to a few. Too much can easily be made about the Grapefruit League for sure. Which is why Dempster’s track record against the Yankees is one of those items that anyone could make too big or too little of a deal about. In five starts against the Yankees, Dempster is winless, 0-4. Here at the new Yankee Stadium, he got hammered last summer when he was with the Rangers, giving up eight runs in six innings. At the old Yankee Stadium, he went 0-2 in two starts for an 8.44 ERA. “They have a great team over there, they always do, you have to be on your game and be focused and go out there and execute pitches as much as possible and if you can do that, put the ball where you want, hopefully you get the results you want,’’ said Dempster.