Tim Tebow strikes again ... as in, he just bought up even MORE real estate in Jacksonville, Florida -- and this new place is awesome.
The New York Mets prospect plunked down $3 mil to scoop up an 8,100 square foot mansion in an exclusive private community in South Jacksonville, according to JaxDailyRecord.
Tebow, who recently got engaged to longtime girlfriend Demi-Leigh Nel-Peters (the 2017 Miss Universe winner), had previously bought a smaller home nearby for $1.4 mil in 2014 ... but clearly he felt he was due for an upgrade.