NEW YORK (TheStreet) -- Investors have enjoyed another great year in the stock market, with the S&P 500up nearly 13% in 2014. With only a few days left in the year, TheStreet TV's Jack Mohr took a look at some of the worst performers in the stock market. 

First: GameStop (GME) - Get Report , whose shares have dropped 29% on the year. Management and investors assumed Microsoft's (MSFT) - Get Report Xbox One and Sony's (SNE) - Get Report Playstation 4 would kickstart a wave of upgrades and drive higher sales for GameStop as other new consoles have done. 

That hasn't been the case. Direct digital downloads have allowed gamers to forego physical disks by downloading the game over the Internet directly to their consoles. GME management seems to be in denial about this trend and for that reason investors should avoid the name, Mohr said.  

Next: Coach (COH) , which has fallen 34% in 2014. Investors should continue to avoid this one as well, Mohr said. The stock still trades at a "lofty valuation" despite the "tepid" sales projections for 2015, he explained. 

Although Coach is a leader in the the women's luxury goods segment, the brand clearly isn't resonating with consumers. Sales in North America fell 20% year-over-year in the most recent quarter. 


Transocean RIG, GameStop GME, and Coach COH data by YCharts

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Finally, Transocean (RIG) - Get Report : The stock is down nearly 62% on the year, making it the worst performer in the S&P 500. 

However, unlike the other two companies, this is a stock investors should actually consider buying. Mohr called Transocean one of his top European stocks to buy for the new year

The Swiss offshore drilling company controls the largest ultra-deepwater drilling fleet in the world and has a "dirt-cheap" valuation, Mohr said. With a huge order book, strong cash flows and currently trading at less than half of its book value, Transocean may turn into one of the strongest performers of 2015. 

-- Written by Bret Kenwell 

Follow @BretKenwell

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.