He left convinced that Moylan was the key to the Panthers ending an 11-year premiership drought.
"He is not a potential star anymore. Throw the word 'potential' away - he's been outstanding," Alexander said. "His ability to break open the defence is remarkable.
"He is the key man for Penrith."
Immortal Andrew Johns has also liked what he has seen.
When Moylan made his NRL debut last year, Johns joked that the baby-faced fullback looked like a member of boy band One Direction. Now Moylan, 23, reminds Johns of someone else with a distinctive voice - husky-throated Broncos legend Darren Lockyer.
Remarkably Moylan was not guaranteed the Penrith No1 jersey in the pre-season.
"Yeah there were a few other guys in the running there - Kevvie [Naiqama], Will [Smith] and probably Dal [Dallin Watene Zelezniak] as well," Moylan said.
"I had to have a big off-season and trial well. They told me I had the first crack there but had to perform and keep training hard."
Hard-marking Penrith coach Ivan Cleary added: "We'd like to think everyone's position was in doubt, really. You've got to earn your spot.
"That's how it's been and Matt's certainly done that."
Moylan had never made a representative side before he arrived at Penrith - now he is touted as a Four Nations bolter.
But Alexander believed Moylan had already achieved something special this season - he has got Penrith believing they can claim title number three.
Moylan seemed to be everywhere before pivot Jamie Soward kicked the winning field goal in their 19-18 NRL qualifying win over defending champions Sydney Roosters two weeks ago. And all eyes will be on Moylan again in tonight's preliminary final against the Bulldogs.
"The win against the Roosters was their best since the 2003 grand final," Alexander said.
"It's got everyone hoping and believing again."
Match notes
Referees: Shayne Hayne, Gavin Badger.
Head to head: Canterbury 48 Penrith 34 Drawn 3
Last clash: Round 21 2014 - Penrith 22 bt Canterbury 16 at ANZ Stadium
TAB: Canterbury $1.67 Penrith $2.10 Despite beating Canterbury twice this year, rested from a week off after seeing off the reigning premiers in week one of the finals, Penrith are still the underdogs for this clash between the western Sydney rivals. They've been written off all season but continued to confound their critics and are now 80 minutes away from a first grand final in 11 years. Canterbury edged out Manly in golden point last week and in coach Des Hasler they have a tried and tested September specialist. No team has won the grand final from outside the top four since 1995 - and that was Chris Anderson's Bulldogs side. Form lines suggest it should be a Penrith victory, but no team is better than grinding out a win than the Bulldogs.
Key: When it comes to class Penrith has the superior spine. Soward and fullback Matt Moylan have developed a telepathic understanding, and few hookers are more energetic than James Segeyaro. But what Bulldogs halfback Trent Hodkinson lacks in flair, he makes up for in big-game temperament and Michael Ennis and Josh Reynolds are ultimate competitors. But is it enough?
Tip: Penrith
- AAP
