The Major League championship between the two teams begins today at 6 p.m. at Rudy York Field.
After counting on some late-inning magic to defeat the Dodgers, 17-15, on Tuesday, the Phillies jumped ahead 3-0 against the Padres with Root's three-run single in the first inning.
About an inning later, Davis delivered a three-run homer to stretch the Phillies' lead to 6-0.
Root drove in his fourth RBI, a game-high, on a sacrifice groundout in the fourth inning.
With his teammates providing a generous helping of run support, Davis did not disappoint. Davis, who finished with 10 strikeouts, pitched into the sixth inning with two outs, nearly throwing a no-hitter before Roderick Winburn got a hold of one of his selections for a solo home run, breaking up the shutout and the no-hitter.
Khase Willis relieved Davis and got the final out in the sixth on a groundout.
Jacob Frye, Brycen Jones and Brant Smith pitched for the Padres, combining for six strikeouts.
For the Phillies, Davis had two hits, with a home run, two runs and three RBIs; Root had one hit with four RBIs; Jake Norris had one hit; Blane Belisario had one hit with a walk and a run; Jake Hacker drew a walk and scored a run; Josh Holmes was hit by a pitch, drew a walk and scored two runs; and Willis walked once and scored a run.
The Phillies, who emerged from the losers' bracket, will need to beat the Indians twice in order to claim the CLL Major League title.
The Indians -- who began the double-elimination tournament seeded No. 5, one spot ahead of the Phillies -- are coming off a decisive 18-0 victory over the Padres Tuesday.
Reds force winner-take-all game in Minor League finals
Heading into Wednesday's CLL Minor League championship, the Reds were faced with the proposition of having to twice defeat a team that had not lost in almost two months.
Well, the Reds inched one step closer to that realization following their 10-5 win over the Pirates.
Dylan Henderson hit a two-run double in the third inning as the Reds grabbed a 3-1 lead, an advantage they would not relinquish.
The two teams each traded runs in the fourth as the Reds maintained a two-run lead, but a three-run triple by Henderson in the top of the fifth capped a four- run inning -- the maximum number of runs allowed per inning.
The Pirates came close to matching the Reds' half-inning total as they pushed three more runs across the plate to trim the lead to 8-5, but the Reds closed the game with two additional scores in the sixth.
The Pirates took an early 1-0 lead in the bottom of the first when Mason Watson drove in a run. Watson tied for a team-high two RBIs, a total that Cole Crump also reached.
Today's championship series finale begins at 5:45 p.m. at Bill Bruce Field.