What once appeared to be a long shot now seems to be a very real possibility.

When the Red Sox open their season at Camden Yards on March 31, Grady Sizemore could well be the man leading off and starting in center field.

After two years in which Sizemore didn't play a single game in the Major Leagues, it was unfair to expect he could pass all the tests that would come his way in Spring Training.

Yet so far, that's exactly what Sizemore has done. He took another significant step Tuesday, starting back-to-back games for the first time in Spring Training.

With each passing day, Sizemore feels like more of a baseball player again, one who could develop into one of the best comeback stories of the 2014 season.

"I wasn't all that curious about it," Sizemore said of playing back-to-back. "I felt confident knowing it was going to be a pretty normal day. If I had any questions or doubts, I probably wouldn't have been out there. But I felt strong that it was going to be fine and it wasn't going to be an issue."

In Sizemore's first at-bat, he hit a grounder that deflected off the glove of the second baseman, creating a chance for an infield hit. Sizemore was thrown out by about a step, but he continues to make good time down the line.

Sizemore, who went 0-for-2 on Tuesday, has played in five Grapefruit League games, batting .308. He looks mobile in the outfield and has impressed the Red Sox with his swing.

The things that Sizemore is trying to find now are all things he should regain simply with time.

"I feel good, but not great. My timing feels off," Sizemore said. "It feels a little rusty, but I don't feel like it's been two or three years. I feel like it's just another Spring Training where it's early where you're just trying to get a hold of things and get that rhythm down. I still feel like I have a long way to go. It's not quite where I would like it to be and I want to fine-tune some things."

In giving Sizemore a one-year, $750,000 contract -- with incentives that could bring the deal up to $6 million -- the Red Sox made a deal that made sense for everyone.