Trout has been a key factor in this series as his Los Angeles Angels try to extend their win streak to eight and push the Royals' home slide to eight.Los Angeles (22-27) is enjoying its longest run since an eight-game streak May 22-29, 2012. Trout is 11 for 21 with two homers and seven RBIs over his last five contests.The speedy center fielder has scored twice in each game of this set. Trout has hit safely in all six games in the season series, going 9 for 21 with three homers, six RBIs and 10 runs scored.The Angels have outscored their opponents 54-18 during this run.Catchers Chris Iannetta and Hank Conger have combined for three homers in this series while Mark Trumbo is 4 for 12 with five RBIs to push his hitting streak to 10 games."Obviously, confidence as a team builds as you start to move in the right direction," manager Mike Scioscia said following Saturday's 7-0 win. "Right now these guys feel good because we're playing the type of baseball we had hoped we would play the first month, but it didn't appear."It's here now. I think you see guys are comfortable playing our game, and let the other team try to stop us. That's the mode we want to get into when we're at our best."Kansas City (21-25) has totaled 24 runs while dropping eight of nine as it tries to avoid its first five-game slide. This is the Royals' longest home skid since their 0-10 start last year.Cleanup hitter Billy Butler is 0 for 8 with four walks in this series, going seven straight games without a RBI.The Royals rank 13th in the AL with 190 runs and last with 28 home runs."We're just not getting it done right now," center fielder Lorenzo Cain said. "We've got to step up and start doing better. Offensively, we're struggling big-time."The Royals will be without catcher Salvador Perez, placed on the bereavement list after Saturday's game following the death of his grandmother.Both teams will start right-handers Sunday.Jerome Williams (3-1, 2.53 ERA) will make his fifth start for the Angels after going 2-1 with a 3.24 ERA in the first four, lasting a season-high eight innings in Tuesday's 12-0 rout of Seattle.Williams has started once against the Royals. He has limited Jeff Francoeur to a single in 12 at-bats and Miguel Tejada to two in nine, with no other Kansas City hitter having three at-bats against him.Opponents are hitting .351 against Royals starter Wade Davis (3-3, 5.91) for one of baseball's worst marks. He is facing the Angels again after earning a 9-5 victory over them May 15 by yielding four runs over 5 1/3 innings.Josh Hamilton, struggling with a .222 average and .386 slugging percentage, is 5 for 7 with a homer against Davis.The Angels are seeking their first four-game sweep in Kansas City since Aug. 6-9, 2004. This is their sixth four-game set at Kauffman Stadium since.