Jenkins is currently hitting .286, not .268. Whether he can keep that up is another question, but he has hit over .300 in the past so it's possible. I picked him up in a 12-team league a while back and I've been extremely happy with him. He is streaky, but what I've done is bench him if he has an 0 for 4 or 0 for 5 for a game or two and wait until he heats back up to put him back in. You miss the occasional big game when he first turns it around that way, but you also avoid the bulk of his slumps. You don't miss much though, as he usually stays hot for a few games at least, so once you see him have a good game, get him back in there and enjoy the ride.
Lately, he's stayed hot and I've kept him in all the time and he's been huge for me. I'd definitely pick him up if he's available, especially if you have another OF option on your bench you can sub in for him if he hits another of his mini-slumps.
"I'm telling ya, he jumped us. Gloves off, stick down, no warning. He challenged the Chiefs. Called us names. But Dave was there."
"Dave's a killer."
"Yeah, Dave's a killer."
"Dave's a mess."