He produced a superb run around in midfield with Brian O'Driscoll before Gordon D'Arcy freed Horgan.
"I am surprised that Paul O'Connell got the captaincy ahead of Brian O'Driscoll, " he said.
Centres Brian O'Driscoll (concussion) and Jamie Roberts (wrist) were also ruled out of the third Test.
Wallace will partner captain Brian O'Driscoll at centre with Trimble named at left wing.
Captain Brian O'Driscoll will earn his 100th Ireland cap in Saturday's match at Croke Park.
Roberts's centre partnership with Brian O'Driscoll has been one of the most effective combinations on tour.
Brian O'Driscoll and Rob Kearney produced superb breaks but poor handling prevented any Leinster tries.
Ireland captain Brian O'Driscoll also attempted to take the positives from his team's victory.
Brian O'Driscoll, Earls, Rob Kearney and Shane Horgan added further touchdowns after the interval.
Ireland had led 13-9 at half-time thanks to Brian O'Driscoll's record-equalling 24th championship try.
Indeed, the Irish side were also the more fluid, despite being without the injured Brian O'Driscoll.
Shaun Goater headed Reading in front, only to see Brian O'Neil's 25-yarder bring Preston level soon afterwards.
Battery Ventures recently added two entrepreneurs-in-residence, says general partner Brian O'Malley, up from none six months ago.
Captain Brian O'Driscoll, Rob Kearney and Shane Horgan also crossed as Ireland built on a 13-3 halftime lead.
Four of the backs are from Leinster with Luke Fitzgerald getting a chance at centre, partnering Brian O'Driscoll.
Despite the plaudits earned by his midfield partnership with Brian O'Driscoll, Roberts believes he and the Irishman can improve.
Brian O'Driscoll had also hobbled off but Jamie Heaslip and Fergus McFadden tries made the game safe for Leinster.
Brian O'Driscoll and Jamie Roberts on paper looks good as a centre partnership.
Wallace was Brian O'Driscoll's regular centre partner during last year's Grand Slam campaign.
Ireland captain Brian O'Driscoll broke the championship try-scoring record with his 25th try before Steve Thompson collected a consolation score.
Wings Luke Fitzgerald and Shane Horgan each claimed a brace, while Brian O'Driscoll, Jonathan Sexton and Girvan Dempsey also crossed.
In 1591, the Lord of Leitrim in Ireland, Sir Brian O'Rourke, was executed for sheltering Spaniards from the defeated Armada.
Skipper Brian O'Driscoll, one of Ireland's try-scorers, reflected that the victory was not as easy as the final scoreline suggested.
Ireland captain Brian O'Driscoll raced away for a try on 12 minutes and added another midway through the second half.
BBC: SPORT | Rugby Union | My Club | Leinster | Leinster 26-10 Agen
Ireland great and 2005 Lions captain Brian O'Driscoll was also included, with the 34-year-old centre chosen for his fourth successive tour.
CNN: Welsh star Warburton to lead Lions but Wilkinson is left out
Brian O'Driscoll, who was forced off with a knee injury at half-time, scored twice as the hosts took a 12-3 lead.
Isa Nacewa, Gordon D'Arcy and Brian O'Driscoll scored second-half tries, with Retief Uys and Scott Spedding replying with tries for Brive.
Brian O'Driscoll soon made his mark though and cut through the Ospreys back-line before releasing Kearney to cross for his side's second-try.
After a great break by Denis Hickie, captain Brian O'Driscoll chipped ahead and out-paced Tertius Losper to score, with Ronan O'Gara converting.
That team included current internationals Brian O'Driscoll, Donncha O'Callaghan and Paddy Wallace.
应用推荐