You might think that headline means that Giants reliever Jeremy Affeldt was playing catch* with his son and somehow hurt his knee that way.

* Yes, "playing catch". "Having a catch" is an affront to the English language.

I didn't quite know how else to headline the actual way Affeldt hurt his right knee, so here's a description:

The left-hander sprained his right knee Saturday night when he reached out to catch his 4-year-old son, Walker, as the 60-pound boy jumped off the couch to hug his arriving father.

Affeldt said he heard a pop but didn't think there was anything seriously wrong. Then he woke up at 4 a.m. Sunday with throbbing pain and headed to the ballpark a few hours later after icing the knee with a package of frozen vegetables.

Food seems to be important to the Giants lefthander, because last year he injured himself in a hamburger-related mishap:

An MRI exam revealed the sprain for Affeldt, who last Sept. 8 sliced his non-throwing hand nearly to the artery while separating frozen hamburgers.

I shouldn't make too much fun of this. Affeldt will miss seven to 10 days, probably have to go on a rehab assignment, and wear a knee brace when he returns. And yes, 60 pounds is pretty big for a four-year-old:

Affeldt - 0-1 with a 4.09 ERA in 10 outings this year - said his 4 1/2 -foot son is exceptionally large for his age, already measuring around the 50th percentile for an 8-year-old on growth charts.

"I don't tell him that it was him," Affeldt said. "He just asked me what I did, I said, `Picking something up,' he said, `What?' I said, `Something.' It's not something I really want my son to know. It just happened."

The Giants recalled lefthander Travis Blackley from Triple-A Fresno to take Affeldt's place on the 25-man roster.

For more on the Giants, please visit and SB Nation Bay Area.