As the MLB season approaches the midway mark, it’s time to break out the red pen and grade all 30 clubs, from the surging Washington Nationals to the last-place Boston Red Sox.

In the process of writing up report cards, the most important factor was each club’s win-loss record. At the same time, how a team has either exceeded or fallen short of its preseason expectations was also a critical consideration. That’s good news for a team like the Houston Astros and a bummer for a squad like the Red Sox.

Finally, teams were also judged on how well they’ve navigated the injury issues that have cropped up in the opening months of the campaign. For the likes of the San Francisco Giants and Tampa Bay Rays, that means both teams earned high marks.

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