A scary moment in San Francisco last night:

After starting their morning by learning of Angels pitcher Nick Adenhart's death in a car accident, the Giants and their fans departed the ballpark after absorbing the awful ninth-inning sight of rookie reliever Joe Martinez taking a Mike Cameron line drive off his head, which left players on both sides shaken.

Martinez, 26 and pitching in his second big-league game, was able to walk off the field as a trainer held a towel to the right side of his face, which the ball struck squarely. He was badly swollen and bleeding.

Thankfully Martinez appears to be OK, but sights like that instantly remind you of Matt Clement, Bryce Florie, Rafael Soriano and Chris Young. They all came back to pitch following their respective incidents -- Florie only briefly -- but such events can certainly be career-changers.

More importantly, it reminds you of just how dangerous it can be for a pitcher out there, a mere 60 feet from the functional equivalent of artillery fire, defenselessly leaning forward following the delivery of the pitch. And that's before you take the potential shattering of maple bats into consideration.

It's been a rough couple of days in baseball. Here's hoping this weekend brings nothing but good news and good games.