But he is hoping his old man will be in good spirits tonight whether the Ibrox club win, lose or draw.
For MacGregor Jnr will be lining up for Stranraer against the Glasgow giants in a League One game at Stair Park this afternoon.
And the defender reckons if he can help the the home team pull off an upset against Ally McCoist's side his father will be delighted - despite his allegiances.
He said: "My dad is a Rangers fan and has season tickets at Ibrox. He has travelled the length and breadth of the country watching the club home and away.
"And his mood can go up or down on a Saturday night depending on the Rangers result.
"But I would like to think he is a supporter of me as well, so hopefully he is happy this weekend no matter what the outcome of the game."
And the 32-year-old, who spent over a decade at Morton before moving to Stranraer two years ago, reckons his club have an excellent chance of getting a result.
The Blues scored eight goals as they racked up wins over Championship rivals Dumbarton and League One opponents Brechin in their opening two matches.
And MacGregor is confident Stephen Aitken's team has the firepower up front to score against their illustrious visitors
He said: "Rangers have got a lot of quality. They are a full-time club and have a lot of very good players.
"We will have to be well-organised and will all have to play to the best of our abilities to get a result against them.
"But we have done a lot of hard work on our organisation in training this week. We have to go out there and believe we can cause an upset.
"Rangers' form has been patchy away from home in the last season or so."
MacGregor continued: "We have got good, attacking players who can create and take chances.
"We have Martin Grehan, Jamie Longworth and David McKenna, who can all play up front.
"We also have good wide players in Ryan Borris and Mark Corcoran. Sean Winter has also started the season really well. We certainly have options going forward.
"We have also just signed Andy Stirling, who is a very positive and technically excellent player.
"We have experience throughout the side and we have options on the bench.
"We started the season quite well with wins in two cup games. Unfortunately, we lost our first league game to Stenhousemuir last week. We didn't perform as well as we could have in the first half and paid the price for it.
"It was annoying as up until then we had been on a good run. The boys had been playing really well.
"For some reason or another, it didn't happen for us in the first 45 minutes. Hopefully we can play the game, not the occasion, against Rangers. Hopefully, everyone can perform to the best of their abilities."
Despite being involved in senior football for nearly 15 years, this is the first time MacGregor has played against Rangers in a competitive match.
And the full-back cum centre-half has revealed everyone in Stranraer has also been buzzing about the visit of the Third Division champions.
He said: "I am really looking forward to it. I have played in friendly games in the past, but they are not quite the same as a game with a competitive edge in it.
"It is a big occasion for the town as well as the players. Hopefully there will be a full house at Stair Park.
"Since the League One fixture list was announced everybody in Stranraer and at the club has been looking forward to this one.
"Every stadium Rangers went to last season was filled out. It was a huge boost financially for all of those clubs during a really difficult time economically."
MacGregor added: "Locals who don't normally go to Stranraer games will be at the match and I reckon having that sort of backing will help us hugely.
"But it is good for Stranraer supporters who follow us through thick and thin to have the chance to see us play Rangers.
"It is not easy supporting us with the length of the journeys involved. It is a just reward for their loyalty."