No there wasn't. The reason why Marco Polo (14th century btw) was such a big deal was precisely because it was not something people would normally do. "Trade" between China and Europe wasn't done by some dude loading up shit in China and selling it in Europe. It was made by a dude in China selling his shit somewhere in central asia, where another dude sold it in persia, where another dude sold it in Syria, where it got loaded on a ship and finally reached a European port. They really weren't doing some ridiculous monster trek where they'd go all the way there and back, and similarly, a trader from Mali would've sold his shit in northern Africa and go back, and certainly wouldn't travel to central Europe.
Of course, one could argue he was an explorer rather than trader, as making such treks was indeed possible. I do not know of any Malian explorers from the 14th century, but I don't deny their existence either. But does such ridiculous exception really merit representation in the game? For what purpose? It doesn't illustrate how life was back then, as the overwhelming majority of people would've gone their whole lives without meeting such an explorer. Why is there a desire to find however improbable excuse to include nigs in the game?
You're right about trade I guess, however about the broader subject of explorer you've made me check my reference book "le Peuple des Steppes" (Grousset), where among other examples, it reviews European influence in China under the Yuan dynasty :
- In 1291 Petrus de Lucalongo, an Italian merchant, settled in Beijing.
- in 1305 he offers land to the Franciscan Jean de Montecorvino
- Andalo de Savignano went twice to China, second time around 1338
- In 1313 3 more Franciscan arrived in Beijing, where two churches had been built by Montecorvino and many an heathen converted, and 3 others to various closer Asian places.
- The missionary Odoric de Pordenone traveled through most of Asia before landing in China, extensively exploring the place for a couple years before coming back.
- 2 other priests were sent after Montecorvino death. Nicolas died on the way, while Jean de Marignolli travelled in Asia and China for 14 years.
- Party ended when the Ming took power in 1368.
I won't be arsed to look for more details but there were also some European craftmen detained at the court of some Khan (that was met by a fellow Westerner). Deporting or offering prisoners skilled in arts or craft has always been done and let to interesting stories, such as Greek settlements in Bactria made of population deported by Darius, that lived and evolved and mixed and whose culture was still around in the Oasis States in Tarim around 4th century AD.
I may have strayed away a little, but my point is that people have always moved around, and it makes for fascinating stories.