Junior Lake is worth a pickup if you need a SS or MI. He's hit well at AAA this year and has above average speed. Despite playing mostly infield throughout his minor league career he'll play center-field for the Cubs until David DeJesus returns in about week. After that Lake's status will be up in the air.
Henry Urrutia was called up by the Orioles and is worth a pickup in AL-only leagues. He should hit for a decent average and has potential for about 10 HR the rest of the way with regular at-bats.
Francisco Rodriguez is likely to be traded. I think that Jim Henderson will return to his closer role if K-Rod is shipped out. John Axford has been much better since his early season blowup and would also be an option to close.
Donovan Hand has pitched well this season and will get a start on Tuesday vs. the Padres. I like him as a streaming option in NL-only leagues.
Chris Carpenter is pitching at AAA right now and will likely be an impact fantasy SP if he's deemed healthy enough to return to the Cardinals rotation. I suggest picking him up right now if he's un-owned in your league and you have the bench or DL space.
Pick up Blake Parker and/or Pedro Strop if you want to speculate on saves. There's a good chance Kevin Gregg will be traded. I prefer Parker.
Brad Miller hit 2 HR yesterday and is arguable a top 12 guy at 2B and SS, respectively. If he is somehow un-owned in your league then you should change that.
Tom Wilhelmsen's hold on the Mariners closer job is shaky and Yoervis Medina should be picked up because he's probably within one blown save by Wilhelmsen from taking over.
Matt Holliday was placed on the DL today but will probably only miss about a week due to the filing being retroactive. It sounded like he could be ready to rock this weekend so he should be fine when he's eligible to come off the DL on July 27th.
Peter Bourjos could still miss another 3 weeks with his wrist injury and it's possible that his hitting will be affected upon his return.
Tommy Hanson should return within the next 2 weeks.
If you own Yoenis Cespedes, then like me you may have been excited after his impressive HR derby showing but now the excitement has turned into worry. He's been dealing with pain in his left wrist and even if he returns in a few days which is what they're saying this could affect his power stroke.
J.A. Happ could be ready to rejoin the Blue Jays rotation in about 3 weeks.
Paul Maholm sprained his left (throwing) wrist today against the White Sox and will likely need to be placed on the DL. Brandon Beachy should be ready to replace Maholm in the Braves rotation if needed. Either way, Beachy could be activated within the next 10 days.
Aramis Ramirez will miss at least another couple weeks with his knee injury.
Ryan Vogelsong is set to return to the Giants rotation in about 3 weeks.
Curtis Granderson is about 2-3 weeks away from returning the Yankees lineup.
Alex Rodriguez will probably make his season debut on Monday.
Paul Konerko will likely be activated from the DL by next weekend.
Rafael Betancourt will miss about two weeks after getting his appendix removed. Rex Brothers will take over at closer during that time. Betancourt is a trade candidate and Brothers is worth hanging on to even after he returns.