Philadelphia (19-14) at Arizona (21-11)

The Arizona Diamondbacks still have baseball’s best record, but they’ve come back to Earth somewhat after their torrid start.

The Philadelphia Phillies appear to be just heating up.

The Phillies will look to make it five wins in six games overall - and two straight in Arizona - on Tuesday against the Diamondbacks, who are trying to avoid losing three straight for the first time this season.

Philadelphia (19-14) got off to a rocky start in defense of its NL East title, winning just eight of its first 18 games. The Phillies recovered to win 10 of 14 heading into Monday’s opener of this four-game set in Arizona.

The Diamondbacks (21-11), owners of baseball’s best record, seemed to be a good measuring stick for Philadelphia, but Monday’s series opener was a one-sided affair. The Phillies scored a season high in the 11-4 win.

Second baseman Chase Utley, who leads the majors with 13 home runs, continued his impressive start with two of Philadelphia’s 17 hits, also a season high. Utley upped his average to .362, fourth-best in baseball.

Utley hasn’t fared very well in 11 career games in Arizona, however, where he’s hitting just .220.

The Phillies’ pitching has been remarkably consistent lately, as they haven’t yielded more than five runs in their last 12 games.

Adam Eaton (0-0, 4.72 ERA) has been consistently mediocre - not good enough to win, but not bad enough to lose.

The right-hander allowed two runs and five hits over six innings in a 3-2 win over San Diego on Thursday, when he retired 12 of the last 13 batters he faced.

He’s trying to avoid becoming the first pitcher in 21 years to not receive a decision in his first seven starts.

“My record doesn’t have anything to do with how the season goes,” Eaton said. “I’ve pitched pretty well and pretty poorly at times.”

Jamie Moyer, the oldest active player in the majors at 45, earned the win for the Phillies on Monday. On Tuesday, the Diamondbacks will send baseball’s second-oldest player to the hill.

Randy Johnson (1-1, 4.79) spent the start of 2008 on the disabled list recovering from back surgery, but the 44-year-old left-hander looked good in his first three starts, going 1-1 with a 2.70 ERA.

However, even though he didn’t factor in the decision of Arizona’s 8-7 win over Houston on Wednesday, Johnson gave up six runs and nine hits in only four innings.

“His slider might not be as good as we’ve seen it in the past, but he does have some other weapons,” manager Bob Melvin told the Diamondbacks’ official Web site.

Johnson may find the Phillies more to his liking. He’s 8-1 with a 2.07 ERA against them in his Diamondbacks career.

Philadelphia right fielder Pat Burrell, who’s hitting .315 with nine homers and a team-high 30 RBIs, is 4-for-19 (.211) with 12 strikeouts against Johnson.